US3621589A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Indicia coding and decoding apparatus
Assignee: Individual
•
Filing: 1968-12-03
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Granted: 1971-11-23
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Expires: 1988-12-03
Abstract
Abstract AN INFORMATION SECURITY SYSTEM WHEREIN A MASKING PATTERN IS PERMANENTLY ADDED TO EITHER A SIGNATURE OF ANY LARGER WRITTEN OR PRINTED MATTER OR DIAGRAM THUS CODING AND CAUSING THE MATERIAL TO BE SUBSTANTIALLY UNREADABLE AND WHEREIN AN OPTICAL READOUT PLATE HAVING A MULTIPLICITY OF LENSES ARRANGED TO MATCH THE MASKING PATTERN IS USED FOR DECODING OR READOUT PURPOSES. THE US OF CAMOUFLAGING MARKS ON THE MASKING PATTERN FURTHER REDUCES THE POSSIBILITY OF READOUT WITHOUT THE OPTICAL READOUT PLATE.
Inventors
- 👤 Harry S Jones
- 👤 Richard P Spohn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:30
CPC Classifications
G; G06; G06K; G06K19/00; G06K19/06; G06K19/08; G06K19/10; G06K19/14; G07; G07C; G07C9/00; G07C9/20; G07C9/22; G07C9/24; G07C9/243
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |