Patent US1611354A successfully refreshed from Google Patents.
US3196395A
Expired / Lapsed
US
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Character recognition systems employing autocorrelation
Assignee: International Business Machines Corp
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Filing: 1961-05-15
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Granted: 1965-07-20
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Expires: 1981-05-15
Abstract
No abstract record available.
Inventors
- 👤 Clowes Maxwell Bernard
- 👤 Parks John Ronald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:31
CPC Classifications
H; H04; H04N; H04N3/00; H04N3/10; H04N3/30; G; G06; G06V; G06V10/00; G06V10/10; G06V10/12; G06V10/20; G06V10/40; G06V10/42
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
126 words
AN ELECTRO-OPTICAL SYSTEM FOR THE RECOGNITION OF PRINTED OR WRITTEN CHARACTERS IN WHICH A ZONE INCLUDING THE CHARACTER TO BE RECOGNISED IS REPEATEDLY SCANNED BY A LIGHT SPOT MOVING OVER A RATER PATTERN OF PARALLEL SPACED LINES WHILE THE CHARACTER IS MOVED OVER A PREDETERMINED PATH RELATIVE TO SAID RASTER PATTERN, IN WHICH PHOTO-ELECTRIC MEANS RESPONSIVE TO THE VARIATIONS OF LIGHT TRANSMITTED BY SAID ZONE DURING SAID SCANNING OPERATIONS PROVIDE AN ELECTRIC SIGNAL REPRESENTING THE ENTIRE SHAPE OF SAID CHARACTER, TO WHICH SAID SIGNAL IS APPLIED AS ONE INPUT TO A MULTIPLYING CIRCUIT HAVING AT LEAST ONE FURTHER INPUT SUPPLIED WITH A TIME DELAYED VERSION OF SAID SIGNAL TO DERIVE AN OUTPUT SIGNAL AND MEANS RESPONSIVE TO SAID OUTPUT SIGNAL AND TO REFERENCES, FOR EFFECTING RECOGNITION.
References Cited (Backward Citations)
US2884540A
Cited
US2839149A
Cited
US3041011A
Cited
US2753552A
Cited
US2787188A
Cited
US2847855A
Cited
US2712415A
Cited
US3030021A
Cited
US2924812A
Cited
US2964639A
Cited
US2989890A
Cited
US2952075A
Cited
US2978675A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-07-19 | 1969-01-18 | 1969-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-19 | 1973-01-18 | 1973-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-19 | 1977-01-18 | 1977-07-20 | $7700.00 | Window Closed / Lapsed |