US5052797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copy viewer
Assignee: Individual
•
Filing: 1990-02-20
•
Granted: 1991-10-01
•
Expires: 2010-02-20
Abstract
Abstract A copy viewer having a support stand for holding material to be copied in a viewing position and a "see-through" display device for displaying copied material directly over the material to be copied.
Inventors
- 👤 Erik H. Madsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:37
CPC Classifications
B; B41; B41J; B41J29/00; B41J29/15; Y; Y10; Y10S; Y10S353/00; Y10S353/05
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
54 words
A copy viewer comprising a support stand; means for supporting material to be copied on the support stand; and means for displaying copied material to overlie the material to be copied, whereby a viewer can see the copied material and look through said copied material to the material to be copied for comparison purposes.
Claim 2
Dependent Claim
54 words
A copy viewer comprising a support stand; means for supporting material to be copied on the support stand; and means for displaying copied material to overlie the material to be copied, whereby a viewer can see the copied material and look through said copied material to the material to be copied for comparison purposes.
Claim 3
Dependent Claim
33 words
A copy viewer as in claim 1, wherein the means for supporting material to be copied comprises a backrest to receive sheets of paper and the like thereon containing material to be copied.
Claim 4
Dependent Claim
47 words
A copy viewer as in claim 2, wherein the means for displaying copied material comprises a semi-reflective, semi-transparent sheet of material spaced from the backrest and a projector receiving images of material copied and projecting them onto the semi-reflective, semi-transparent sheet to overlie the material being copied.
Claim 5
Dependent Claim
33 words
A copy viewer as in claim 1, wherein the means for supporting material to be copied comprises a viewing screen and means to project said material to be copied onto said viewing screen.
Claim 6
Dependent Claim
47 words
A copy viewer as in claim 4, wherein the means for displaying copied material comprises a semi-reflective, semi-transparent sheet of material spaced from the backrest and a projector receiving images of material copied and projecting them onto the semi-reflective, semi-transparent sheet to overlie the material being copied.
Claim 7
Dependent Claim
23 words
A copy viewer as in claim 3, wherein the projector receiving images of material copied and projecting them comprise a cathode ray projector.
Claim 8
Dependent Claim
23 words
A copy viewer as in claim 4, wherein the projector receiving images of material copied and projecting them comprise a cathode ray projector.
Claim 9
Dependent Claim
26 words
A copy viewer as in claim 3, wherein the projector receiving images of material copied and projecting them comprises a multiple light source array of projector.
Claim 10
Dependent Claim
32 words
A copy viewer as in claim 1, wherein the means for displaying copied material comprises a transparent liquid crystal display spaced from and overlying the means for supporting material to be copied.
Claim 11
Dependent Claim
33 words
A copy viewer as in claim 9, wherein the means for supporting material to be copied comprises a backrest to receive sheets of paper and the like thereon containing material to be copied.
Claim 12
Dependent Claim
47 words
A copy viewer as in claim 9, wherein the means for displaying copied material comprises a semi-reflective, semi-transparent sheet of material spaced from the backrest and a projector receiving images of material copied and projecting them onto the semi-reflective, semi-transparent sheet to overlie the material being copied.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-09-30 | 1995-04-01 | 1995-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-30 | 1999-04-01 | 1999-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-30 | 2003-04-01 | 2003-10-01 | $7700.00 | Window Closed / Lapsed |