US5018208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Input device for dynamic signature verification systems
Assignee: Individual
•
Filing: 1990-04-02
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Granted: 1991-05-21
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Expires: 2010-04-02
Abstract
Abstract Finger pressure exerted by a writer's fingers on the barrel of a hand-held instrument is employed to dynamically verify a signature.
Inventors
- 👤 Karen S. Gladstone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:53
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/01; G06F3/03; G06F3/033; G06F3/0354; G06F3/03545; G06V; G06V40/00; G06V40/30; G07; G07C; G07C9/00; G07C9/30; G07C9/32; G07C9/35
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
150 words
An input device for use in a dynamic handwritten pattern verification system, particularly for a signature verification system, comprising: (a) a housing having a hand-held barrel extending along an axis and terminating in a writing tip; (b) positioning means on the barrel adjacent the tip for positioning a plurality of fingers of one hand of a writer forming a handwritten pattern in a one-handed writing configuration at a plurality of preselected locations on the barrel; (c) barrel pressure transducer means for sensing radially-inwardly-directed writing pressure by said fingers against the barrel during forming of the handwritten pattern, including at least one transducer located at one of the preselected locations in a force-transmitting relationship with the respective finger positioned thereat to convert radially-inwardly-directed writing pressure exerted by the respective finger on the barrel to an electrical output signal; and (d) means for conducting the electrical output signal to the verification system.
Claim 2
Dependent Claim
150 words
An input device for use in a dynamic handwritten pattern verification system, particularly for a signature verification system, comprising: (a) a housing having a hand-held barrel extending along an axis and terminating in a writing tip; (b) positioning means on the barrel adjacent the tip for positioning a plurality of fingers of one hand of a writer forming a handwritten pattern in a one-handed writing configuration at a plurality of preselected locations on the barrel; (c) barrel pressure transducer means for sensing radially-inwardly-directed writing pressure by said fingers against the barrel during forming of the handwritten pattern, including at least one transducer located at one of the preselected locations in a force-transmitting relationship with the respective finger positioned thereat to convert radially-inwardly-directed writing pressure exerted by the respective finger on the barrel to an electrical output signal; and (d) means for conducting the electrical output signal to the verification system.
Claim 3
Dependent Claim
16 words
The input device according to claim 1, wherein the housing is constituted of a resilient material.
Claim 4
Dependent Claim
12 words
The input device according to claim 1, wherein the housing is pen-shaped.
Claim 5
Dependent Claim
22 words
The input device according to claim 1, wherein the housing is a light pen having a light sensor mounted at the tip.
Claim 6
Dependent Claim
45 words
The input device according to claim 4, wherein the housing includes a protective cover mounted over the light sensor, said cover having a generally planar writing surface spaced from the light sensor, and means for conducting light between the writing surface and the light sensor.
Claim 7
Dependent Claim
31 words
The input device according to claim 1, wherein the transducer means includes a plurality of transducers respectively located at the preselected locations in force-transmitting relationship with the respective fingers positioned thereat.
Claim 8
Dependent Claim
18 words
The input device according to claim 1, wherein the positioning means includes three finger-receiving grips adjacent the tip.
Claim 9
Dependent Claim
17 words
The input device according to claim 1, wherein the positioning means is integrally formed with the barrel.
Claim 10
Dependent Claim
43 words
The input device according to claim 7, wherein the positioning means includes a thumb-receiving grip for receiving a thumb tip, a forefinger-receiving grip for receiving a forefinger tip, and a middle finger-receiving grip for receiving a lower knuckle region of the middle finger.
Claim 11
Dependent Claim
14 words
The input device according to claim 1, wherein the transducer is a piezo-electric transducer.
Claim 12
Dependent Claim
16 words
The input device according to claim 10, wherein the piezo-electric transducer is embedded in the barrel.
Claim 13
Dependent Claim
46 words
The input device according to claim 6, wherein the positioning means fixedly positions the thumb, forefinger and middle finger relative to the barrel during forming of the handwritten pattern, and wherein the transducer means includes three piezo-electric transducers mounted within, and arranged circumferentially about, the barrel.
Claim 14
Dependent Claim
37 words
The input device according to claim 1, wherein the tip is movable on and across a platen, and wherein the transducer means senses radially-inwardly-directed finger pressure against the barrel during lifting of the tip off the platen.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-05-20 | 1994-11-19 | 1995-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-20 | 1998-11-19 | 1999-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-05-20 | 2002-11-19 | 2003-05-21 | $7700.00 | Window Closed / Lapsed |