Patent US952028A successfully refreshed from Google Patents.
Patent US3588822A successfully refreshed from Google Patents.
US3588822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Character recognition apparatus for identifying characters by detecting stroke features of the characters
Assignee: Hitachi Ltd
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Filing: 1968-03-05
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Granted: 1971-06-28
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Expires: 1988-03-05
Abstract
Abstract THE CHARACTER FACE IS DIVIDED INTO THREE ZONES AND SCANNED IN VERTICAL AND HORIZONTAL DIRECTIONS BY MEANS OF A SCANNER TO BE CONVERTED INTO TIME SERIES DIGITAL SIGNALS IN RESPONSE TO THE PRESENCE OF A CHARACTER IMAGE, WHICH DIGITAL SIGNALS ARE FED TO CASCADE CONNECTED THREE DYNAMIC MEMORIES. FROM THE FIGITAL SIGNALS STORED IN THE DYNAMIC MEMORIES STROKE FEATURES ARE DETECTED BY A FEATURE DETECTING DEVICE. THE CHARACTER IS RECOGNIZED BY IDENTIFYING THE COMBINATION OF THE STROKE FEATURES BY MEANS OF A CHARACTER IDENTIFYING DEVICE. THE CHARACTER RECOGNITION APPARATUS OF THE INVENTION IS SIMPLE IN STRUCTURE AND FREE FROM NOISE DISTURBANCE.
Inventors
- 👤 Shinji Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:20
CPC Classifications
G; G06; G06V; G06V10/00; G06V10/40; G06V10/44; G06V30/00; G06V30/10
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) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |