US4376929A — Optimized stress and strain distribution diaphrag…

Claim 1

Independent Claim 93 words

An improved transducer diaphragm for mounting around its periphery to a cylindrical spacer, said diaphragm comprising a plate having an even back surface and a multilevel front surface, which multilevel front surface includes an upper level spaced from said back surface, a lower level closer to said back surface than said upper level, and at least two symmetrically positioned recess portions at said lower level overlying a maximum strain amplitude section of the plate, and a strain gauge mounted on said lower level of the multilevel front surface in each of said recesses.

Claim 2

Dependent Claim 93 words

An improved transducer diaphragm for mounting around its periphery to a cylindrical spacer, said diaphragm comprising a plate having an even back surface and a multilevel front surface, which multilevel front surface includes an upper level spaced from said back surface, a lower level closer to said back surface than said upper level, and at least two symmetrically positioned recess portions at said lower level overlying a maximum strain amplitude section of the plate, and a strain gauge mounted on said lower level of the multilevel front surface in each of said recesses.

Claim 3

Dependent Claim 51 words

A diaphragm as claimed in claim 1, wherein: said diaphragm is intended to measure pressure exerted against said back surface, and wherein a strain gauge is mounted on said lower level of the multilevel front surface in said recess portions which overlie a maximum compression strain amplitude section of the plate.

Claim 4

Dependent Claim 79 words

An improved transducer diaphragm comprising: an outer peripheral portion having a thickness greater than and separated by a boundary from its central sensory portion, said boundary defining at least one offset of said central portion extending into and partially bounded by said peripheral portion for receiving a strain gauge which can be mountable solely on said central sensory portion having a thickness smaller than said peripheral portion and substantially overlying the location of maximum compression amplitude of the diaphragm.

Claim 5

Dependent Claim 79 words

An improved transducer diaphragm comprising: an outer peripheral portion having a thickness greater than and separated by a boundary from its central sensory portion, said boundary defining at least one offset of said central portion extending into and partially bounded by said peripheral portion for receiving a strain gauge which can be mountable solely on said central sensory portion having a thickness smaller than said peripheral portion and substantially overlying the location of maximum compression amplitude of the diaphragm.

Claim 6

Dependent Claim 22 words

The diaphragm as claimed in claim 3, including: at least two offsets of said central portion on opposite edges of the diaphragm.

Claim 7

Dependent Claim 74 words

A stress distribution plate for a pressure transducer having a central plane and a neutral stress plane, the neutral stress plane being displaced from the central plane, a first surface and a second surface, a predetermined pattern of mesas and recesses on the first surface and apertures penetrating the plate through the entire thickness of said plate including said first and second surfaces adjacent said mesas and recesses, and means for actuating the plate.

Claim 8

Dependent Claim 74 words

A stress distribution plate for a pressure transducer having a central plane and a neutral stress plane, the neutral stress plane being displaced from the central plane, a first surface and a second surface, a predetermined pattern of mesas and recesses on the first surface and apertures penetrating the plate through the entire thickness of said plate including said first and second surfaces adjacent said mesas and recesses, and means for actuating the plate.

Claim 9

Dependent Claim 17 words

A plate as claimed in claim 5, including: a recess in said second surface interconnecting said apertures.

Claim 10

Dependent Claim 133 words

In a stress distribution plate, the improvement comprising in combination: an edge region and a raised portion spaced from said edge region and integral with said plate; a first peninsula extending from said edge region to said spaced portion and being connected to said edge region by a first isthmus; a second peninsula extending from said spaced portion to said edge region and being connected to said spaced portion by a second isthmus; mutually spaced apertures penetrating said plate through its entire thickness adjacent said peninsulas and isthmi; a third isthmus interconnecting said first peninsula with said spaced portion; a fourth isthmus interconnecting said second peninsula with said edge region; first and second strain gauges bonded to said diaphragm along said first and second isthmi, respectively; and means for actuating said spaced portion.

Claim 11

Dependent Claim 133 words

In a stress distribution plate, the improvement comprising in combination: an edge region and a raised portion spaced from said edge region and integral with said plate; a first peninsula extending from said edge region to said spaced portion and being connected to said edge region by a first isthmus; a second peninsula extending from said spaced portion to said edge region and being connected to said spaced portion by a second isthmus; mutually spaced apertures penetrating said plate through its entire thickness adjacent said peninsulas and isthmi; a third isthmus interconnecting said first peninsula with said spaced portion; a fourth isthmus interconnecting said second peninsula with said edge region; first and second strain gauges bonded to said diaphragm along said first and second isthmi, respectively; and means for actuating said spaced portion.

Claim 12

Dependent Claim 62 words

A stress distribution plate for a pressure transducer having a central plane and a neutral stress plane, the neutral stress plane being displaced from the central plane, and said plate having a tetraplanar configuration, with a portion of said plate between a first plane and a second plane of said tetraplanar configuration sloping at like angles to said first and second planes.

Claim 13

Dependent Claim 62 words

A stress distribution plate for a pressure transducer having a central plane and a neutral stress plane, the neutral stress plane being displaced from the central plane, and said plate having a tetraplanar configuration, with a portion of said plate between a first plane and a second plane of said tetraplanar configuration sloping at like angles to said first and second planes.

Claim 14

Dependent Claim 127 words

In a pressure transducer having a housing and a strain gauge plate mounted therein, the strain gauge plate having a first surface for the mounting of at least one strain gauge thereon, and a second surface, and also having a stress plane and a neutral pressure plane, the improvement comprising: means including said strain gauge plate having a plurality of recesses in said first surfaces for displacing the neutral stress plane from the central plane and apertures penetrating said plate through the entire thickness of the plate including said first and second surfaces; strain gauge means mounted on said first surface between said recesses; and means connected to said plate for picking up pressure and transferring a picked-up pressure force to a central portion of said plate.

Claim 15

Dependent Claim 127 words

In a pressure transducer having a housing and a strain gauge plate mounted therein, the strain gauge plate having a first surface for the mounting of at least one strain gauge thereon, and a second surface, and also having a stress plane and a neutral pressure plane, the improvement comprising: means including said strain gauge plate having a plurality of recesses in said first surfaces for displacing the neutral stress plane from the central plane and apertures penetrating said plate through the entire thickness of the plate including said first and second surfaces; strain gauge means mounted on said first surface between said recesses; and means connected to said plate for picking up pressure and transferring a picked-up pressure force to a central portion of said plate.

Claim 16

Dependent Claim 23 words

A pressure transducer as claimed in claim 9, wherein: said neutral stress plane is located between the central plane and the second surface.

Claim 17

Dependent Claim 34 words

A pressure transducer as claimed in claim 9 or 10, wherein: said strain gauge means include strain gauge elements connected in a Wheatstone bridge arrangement and individually mounted between recesses on said first surface.

Claim 18

Dependent Claim 52 words

In a transducer diaphragm, the improvement comprising in combination: a recess in said diaphragm encompassed by a circumferential edge region of said diaphragm; a promontory projecting from said edge region into said recess and being integral with said diaphragm; and a strain gauge bonded to said diaphragm in coincidence with said promontory.

Claim 19

Dependent Claim 52 words

In a transducer diaphragm, the improvement comprising in combination: a recess in said diaphragm encompassed by a circumferential edge region of said diaphragm; a promontory projecting from said edge region into said recess and being integral with said diaphragm; and a strain gauge bonded to said diaphragm in coincidence with said promontory.

Claim 20

Dependent Claim 28 words

A diaphragm as claimed in claim 12, wherein: said strain gauge extends from coincidence with said promontory into coincidence with part of said edge region adjacent said promontory.

Claim 21

Dependent Claim 55 words

A diaphragm as claimed in claim 12, wherein: said promontory has the form of a peninsula located in said recess and connected to said edge region by an isthmus; and said strain gauge is bonded to said diaphragm in coincidence with said isthmus and with adjacent portions of said peninsula and of said edge region.

Claim 22

Dependent Claim 47 words

A diaphragm as claimed in claim 12, 13 or 14, including: a raised island located in said recess and spaced from said promontory and from said edge region and integral with said diaphragm; and a further strain gauge bonded to said diaphragm in coincidence with said island.

Claim 23

Dependent Claim 40 words

A diaphragm as claimed in claim 15, wherein: said spaced island has an isthmus interconnecting two main portions of said island; and said further strain gauge is bonded to said diaphragm in coincidence with said isthmus of said spaced island.

Claim 24

Dependent Claim 98 words

In a transducer diaphragm, the improvement comprising in combination: a recess in said diaphragm encompassed by a circumferential edge region of said diaphragm; a first promontory projecting from said edge region into said recess and being integral with said diaphragm; a second promontory separate from said first promontory and projecting from said edge region into said recess diametrically opposite from said first promontory and being integral with said diaphragm; a first strain gauge bonded to said diaphragm in coincidence with said first promontory; and a second strain gauge bonded to said diaphragm in coincidence with said second promontory.

Claim 25

Dependent Claim 98 words

In a transducer diaphragm, the improvement comprising in combination: a recess in said diaphragm encompassed by a circumferential edge region of said diaphragm; a first promontory projecting from said edge region into said recess and being integral with said diaphragm; a second promontory separate from said first promontory and projecting from said edge region into said recess diametrically opposite from said first promontory and being integral with said diaphragm; a first strain gauge bonded to said diaphragm in coincidence with said first promontory; and a second strain gauge bonded to said diaphragm in coincidence with said second promontory.

Claim 26

Dependent Claim 59 words

A diaphragm as claimed in claim 17, wherein: said first strain gauge extends from coincidence with said first promontory into coincidence with a first part of said edge region adjacent said first promontory; and said second strain gauge extends from coincidence with said second promontory into coincidence with a second part of said edge region adjacent said second promontory.

Claim 27

Dependent Claim 114 words

A diaphragm as claimed in claim 17, wherein: said first promontory has the form of a first peninsula located in said recess and connected to said edge region by a first isthmus; said second promontory has the form of a second peninsula located in said recess, spaced from said first peninsula, and connected to said edge region by a second isthmus; said first strain gauge is bonded to said diaphragm in coincidence with said first isthmus and adjacent portions of said first peninsula and said edge region; and said second strain gauge is bonded to said diaphragm in coincidence with said second isthmus and adjacent portions of said second peninsula and said edge portion.

Claim 28

Dependent Claim 50 words

A diaphragm as claimed in claim 17, 18 or 19, including: a raised island located in said recess and spaced from said first and second promontories and from said edge region and integral with said diaphragm; and a third strain gauge bonded to said diaphragm in coincidence with said island.

Claim 29

Dependent Claim 40 words

A diaphragm as claimed in claim 20, wherein: said spaced island has an isthmus interconnecting two main portions of said island; and said third strain gauge is bonded to said diaphragm in coincidence with said isthmus of said spaced island.

Claim 30

Dependent Claim 76 words

A diaphragm as claimed in claim 17, 18 or 19, including: first and second raised islands located in said recess at opposite sides of said first and second promontories and being spaced from said first and second promontories and from each other and integral with said diaphragm; a third strain gauge bonded to said diaphragm in coincidence with said first island; and a fourth strain gauge bonded to said diaphragm in coincidence with said second island.

Claim 31

Dependent Claim 73 words

A diaphragm as claimed in claim 22, wherein: said first island has a first insular isthmus interconnecting two main portions of said first island; said second island has a second insular isthmus interconnecting two main portions of said second island; said third strain gauge is bonded to said diaphragm in coincidence with said first insular isthmus; and said fourth strain gauge is bonded to said diaphragm in coincidence with said second insular isthmus.

Claim 32

Dependent Claim 73 words

In a transducer diaphragm, the improvement comprising in combination: a central portion on said diaphragm having first radial projections, and a circumferential edge region of said diaphragm having second radial projections and encompassing said central portion and first radial projections, a recess in said diaphragm separating said central portion and first radial projections from said edge region and second radial projections; and strain gauges bonded to said diaphragm in coincidence with said projections.

Claim 33

Dependent Claim 73 words

In a transducer diaphragm, the improvement comprising in combination: a central portion on said diaphragm having first radial projections, and a circumferential edge region of said diaphragm having second radial projections and encompassing said central portion and first radial projections, a recess in said diaphragm separating said central portion and first radial projections from said edge region and second radial projections; and strain gauges bonded to said diaphragm in coincidence with said projections.

Claim 34

Dependent Claim 30 words

A diaphragm as claimed in claim 24, wherein: said recess extends perimetrically about said central portion and first radial projections and inside of said edge region and second radial projections.

Claim 35

Dependent Claim 14 words

A diaphragm as claimed in claim 24, wherein: said recess is a sinuous recess.

Claim 36

Dependent Claim 18 words

A diaphragm as claimed in claim 24, wherein: said first and second projections are interdigitated with each other.

Claim 37

Dependent Claim 22 words

A diaphragm as claimed in claim 24, wherein: said central portion and first radial projections form a star pattern in said recess.

Claim 38

Dependent Claim 18 words

A diaphragm as claimed in claim 28, wherein: said second radial projections are complementary with said star pattern.

Claim 39

Dependent Claim 133 words

In a transducer diaphragm, the improvement comprising in combination: a circumferential edge region and a raised central portion spaced inwardly from said circumferential edge region and integral with said diaphragm; diametrically opposed first and second isthmi interconnecting said edge region with said inwardly spaced central portion and being bounded by first and second recesses in said diaphragm extending between said edge region and said central portion; diametrically opposed and mutually spaced third and fourth isthmi in said central portion distinct from said first and second isthmi and being bounded by a third recess extending in and through a center of said raised central portion between said third and fourth isthmi; and first, second, third and fourth strain gauges bonded to said diaphragm in coincidence with said first, second, third and fourth isthmi, respectively.

Claim 40

Dependent Claim 133 words

In a transducer diaphragm, the improvement comprising in combination: a circumferential edge region and a raised central portion spaced inwardly from said circumferential edge region and integral with said diaphragm; diametrically opposed first and second isthmi interconnecting said edge region with said inwardly spaced central portion and being bounded by first and second recesses in said diaphragm extending between said edge region and said central portion; diametrically opposed and mutually spaced third and fourth isthmi in said central portion distinct from said first and second isthmi and being bounded by a third recess extending in and through a center of said raised central portion between said third and fourth isthmi; and first, second, third and fourth strain gauges bonded to said diaphragm in coincidence with said first, second, third and fourth isthmi, respectively.

Claim 41

Dependent Claim 130 words

In a transducer diaphragm, the improvement comprising in combination: a circumferential edge region and a raised central portion spaced inwardly from said circumferential edge region and integral with said diaphragm; diametrically opposed first and second isthmi interconnecting said edge region with said inwardly spaced central portion and being bounded by first and second recesses extending in said diaphragm between said edge region and said central portion; diametrically opposed and mutually spaced third and fourth isthmi in said central portion distinct from said first and second isthmi and being bounded by third and fourth recesses extending in said raised central portion inside of said first and second recesses; and first, second, third and fourth strain gauges bonded to said diaphragm in coincidence with said first, second, third and fourth isthmi, respectively.

Claim 42

Dependent Claim 130 words

In a transducer diaphragm, the improvement comprising in combination: a circumferential edge region and a raised central portion spaced inwardly from said circumferential edge region and integral with said diaphragm; diametrically opposed first and second isthmi interconnecting said edge region with said inwardly spaced central portion and being bounded by first and second recesses extending in said diaphragm between said edge region and said central portion; diametrically opposed and mutually spaced third and fourth isthmi in said central portion distinct from said first and second isthmi and being bounded by third and fourth recesses extending in said raised central portion inside of said first and second recesses; and first, second, third and fourth strain gauges bonded to said diaphragm in coincidence with said first, second, third and fourth isthmi, respectively.

Claim 43

Dependent Claim 32 words

A diaphragm as claimed in claim 30, wherein: said first and second isthmi extend along a diameter of said diaphragm; and said third and fourth isthmi extend in parallel to said diameter.

Claim 44

Dependent Claim 29 words

A diaphragm as claimed in claim 30, wherein: said third isthmus is also bounded by said first recess and said fourth isthmus is also bounded by said second recess.

Claim 45

Dependent Claim 22 words

A diaphragm as claimed in claim 30 or 31, wherein: said first and second isthmi extend along a diameter of said diaphragm.

Claim 46

Dependent Claim 167 words

In a transducer diaphragm, the improvement comprising in combination: a circumferential edge region and a raised central portion spaced inwardly from said circumferential edge region and integral with said diaphragm; a first peninsula extending from said edge region towards, but being spaced from, said central portion and being connected to said edge region by a first isthmus; a second peninsula extending from said edge region towards, but being spaced from, said central portion opposite said first peninsula, and being connected to said edge region by a second isthmus; a third peninsula extending from said central portion towards, but being spaced from, said edge region and being connected to said central portion by a third isthmus; a fourth peninsula extending from said central portion towards, but being spaced from, said edge region opposite said third peninsula, and being connected to said central portion by a fourth isthmus; and first, second, third and fourth strain gauges bonded to said diaphragm along said first, second, third and fourth isthmi, respectively.

Claim 47

Dependent Claim 167 words

In a transducer diaphragm, the improvement comprising in combination: a circumferential edge region and a raised central portion spaced inwardly from said circumferential edge region and integral with said diaphragm; a first peninsula extending from said edge region towards, but being spaced from, said central portion and being connected to said edge region by a first isthmus; a second peninsula extending from said edge region towards, but being spaced from, said central portion opposite said first peninsula, and being connected to said edge region by a second isthmus; a third peninsula extending from said central portion towards, but being spaced from, said edge region and being connected to said central portion by a third isthmus; a fourth peninsula extending from said central portion towards, but being spaced from, said edge region opposite said third peninsula, and being connected to said central portion by a fourth isthmus; and first, second, third and fourth strain gauges bonded to said diaphragm along said first, second, third and fourth isthmi, respectively.

Claim 48

Dependent Claim 17 words

A diaphragm as claimed in claim 35, including: further isthmi between said central portion and edge region.

Claim 49

Dependent Claim 41 words

A diaphragm as claimed in claim 35, wherein: said first and third peninsulas are arranged in a first pair of adjacent but distinct peninsulas; and said second and fourth peninsulas are arranged in a second pair of adjacent but distinct peninsulas.

Claim 50

Dependent Claim 49 words

A diaphragm as claimed in claim 37, including: fifth and sixth isthmi extending from said edge region to said central portion along opposite sides of said first pair; and seventh and eight isthmi extending from said edge region to said central portion along opposite sides of said second pair.

Claim 51

Dependent Claim 66 words

A diaphragm as claimed in claim 38, including: a first curved recess located in said diaphragm between said edge region and said central portion and extending from the fifth isthmus to the seventh isthmus; and a second curved recess located in said diaphragm between said edge region and said central portion and extending opposite said first curved recess from the sixth isthmus to the eighth isthmus.

Claim 52

Dependent Claim 61 words

In a transducer diaphragm, the improvement comprising in combination: distinct first, second, third and fourth isthmi in said diaphragm, each having a longitudinal dimension; said first, second, third and fourth isthmi extending along their longitudinal dimensions in series between opposite marginal diaphragm regions; and first, second, third and fourth strain gauges bonded, respectively, to said first, second, third and fourth isthmi.

Claim 53

Dependent Claim 61 words

In a transducer diaphragm, the improvement comprising in combination: distinct first, second, third and fourth isthmi in said diaphragm, each having a longitudinal dimension; said first, second, third and fourth isthmi extending along their longitudinal dimensions in series between opposite marginal diaphragm regions; and first, second, third and fourth strain gauges bonded, respectively, to said first, second, third and fourth isthmi.

Claim 54

Dependent Claim 28 words

A diaphragm as claimed in claim 40, wherein: said isthmi extend with their longitudinal dimensions in parallel to a diaphragm diameter extending between said opposite marginal diaphragm regions.

Claim 55

Dependent Claim 68 words

In a transducer diaphragm, the improvement comprising in combination: a first pair of isthmi in said diaphragm having longitudinal dimensions; a second pair of isthmi in said diaphragm having longitudinal dimensions; said first and second pairs of isthmi extending with their longitudinal dimensions in series between opposite marginal diaphragm regions; and first, second, third and fourth strain gauges bonded, respectively, to said first, second, third and fourth isthmi.

Claim 56

Dependent Claim 68 words

In a transducer diaphragm, the improvement comprising in combination: a first pair of isthmi in said diaphragm having longitudinal dimensions; a second pair of isthmi in said diaphragm having longitudinal dimensions; said first and second pairs of isthmi extending with their longitudinal dimensions in series between opposite marginal diaphragm regions; and first, second, third and fourth strain gauges bonded, respectively, to said first, second, third and fourth isthmi.

Claim 57

Dependent Claim 41 words

A diaphragm as claimed in claim 42, wherein: the longitudinal dimensions of the isthmi in said first pair extend in parallel to each other; and the longitudinal dimensions of the isthmi in said second pair extend in parallel to each other.

Claim 58

Dependent Claim 68 words

In a transducer diaphragm, the improvement comprising in combination: a plurality of distinct recesses in said diaphragm providing distinct first, second, third and fourth isthmi between adjacent pairs of said recesses; further recesses in said diaphragm in addition to said recesses providing said first, second, third and fourth isthmi; and distinct first, second, third and fourth strain gauges bonded, respectively, to said first, second, third and fourth isthmi.

Claim 59

Dependent Claim 68 words

In a transducer diaphragm, the improvement comprising in combination: a plurality of distinct recesses in said diaphragm providing distinct first, second, third and fourth isthmi between adjacent pairs of said recesses; further recesses in said diaphragm in addition to said recesses providing said first, second, third and fourth isthmi; and distinct first, second, third and fourth strain gauges bonded, respectively, to said first, second, third and fourth isthmi.

Claim 60

Dependent Claim 30 words

A diaphragm as claimed in claim 44, wherein: said further recesses and said recesses providing said isthmi are located in an annular region encompassing a central region on said diaphragm.

Claim 61

Dependent Claim 21 words

A diaphragm as claimed in claim 44, wherein: at least some of said further recesses are interconnected by yet further recesses.

Claim 62

Dependent Claim 95 words

In a transducer diaphragm, the improvement comprising in combination: a plurality of distinct recesses in said diaphragm providing distinct first, second, third and fourth isthmi between adjacent pairs of said recesses, one of said distinct recesses being a central recess in a central region of said diaphragm and the other of said distinct recesses being situated around said central recess in a planetary manner between said central recess and a circumferential edge region of said diaphragm; and distinct first, second, third and fourth strain gauges bonded, respectively, to said first, second, third and fourth isthmi.

Claim 63

Dependent Claim 95 words

In a transducer diaphragm, the improvement comprising in combination: a plurality of distinct recesses in said diaphragm providing distinct first, second, third and fourth isthmi between adjacent pairs of said recesses, one of said distinct recesses being a central recess in a central region of said diaphragm and the other of said distinct recesses being situated around said central recess in a planetary manner between said central recess and a circumferential edge region of said diaphragm; and distinct first, second, third and fourth strain gauges bonded, respectively, to said first, second, third and fourth isthmi.

Claim 64

Dependent Claim 41 words

A diaphragm as claimed in claim 47, wherein: said first isthmus is located between said central recess and a first of said other recesses; and said second isthmus is located between said central recess and a second of said other recesses.

Claim 65

Dependent Claim 38 words

A diaphragm as claimed in claim 48, wherein: said third isthmus is located between a third and fourth of said other recesses; and said fourth isthmus is located between a fifth and a sixth of said other recesses.

Claim 66

Dependent Claim 23 words

A diaphragm as claimed in claim 47, wherein: two of said isthmi are located, respectively, between two different pairs of said other recesses.

Claim 67

Dependent Claim 47 words

In a transducer diaphragm, the improvement comprising in combination: a lacunose surface region on said diaphragm; recesses in said surface region interconnecting lacunae of said lacunose surface region; and strain gauges bonded to said diaphragm in coincidence with regions located between lacunae of said lacunose surface region.

Claim 68

Dependent Claim 47 words

In a transducer diaphragm, the improvement comprising in combination: a lacunose surface region on said diaphragm; recesses in said surface region interconnecting lacunae of said lacunose surface region; and strain gauges bonded to said diaphragm in coincidence with regions located between lacunae of said lacunose surface region.

Claim 69

Dependent Claim 28 words

A diaphragm as claimed in claim 51, including: isthmi between lacunae of said lacunose surface region; and strain gauges bonded to said diaphragm in coincidence with said isthmi.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1986-03-14	1986-09-13	1987-03-15	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1990-03-14	1990-09-13	1991-03-15	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1994-03-14	1994-09-13	1995-03-15	$7700.00	Window Closed / Lapsed

Optimized stress and strain distribution diaphragms

Abstract

Inventors

Bibliographic Details

Claims Analysis

References Cited (Backward Citations)

USPTO Annuity & Maintenance Windows

Assigned Categories & Tags

Assign Category Tag