Patent US3564498A successfully refreshed from Google Patents.
US3564498A
Expired / Lapsed
US
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Character recognition system
Assignee: Unisys Corp
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Filing: 1969-10-31
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Granted: 1971-02-16
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Expires: 1989-10-31
Abstract
Abstract APPARATUS FOR GATING ELECTRICAL SIGNALS FROM DIFFERENT COMBINATIONS OF NEIGHBORING ONES OF A FEW REPRESENTATIVE STAGES OF A CHARACTER RECOGNITION MATRIX SHIFT REGISTER, THE OUTPUT OF EACH OF THE GATES BEING APPLIED TO THE INPUT TERMINAL OF A DIFFERENT AUXILIARY SHIFT REGISTER WHICH IS SHIFTED SYNCHRONOUSLY WITH THE PRIMARY SHIFT REGISTER. EACH AUXILIARY SHIFT REGISTER THEREBY STORES A LOGICAL FUNCTION OF SIGNALS REPRESENTATIVE OF NEIGHBORING AREAS OF THE CHARACTER FIELD THAT IS EXAMINED.
Inventors
- 👤 David M Stern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:07
CPC Classifications
G; G06; G06V; G06V10/00; G06V10/70; G06V10/74; G06V10/75; G06V10/751
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) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |