US3437824A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical character recognition
Assignee: International Business Machines Corp
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Filing: 1964-10-16
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Granted: 1969-04-08
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Expires: 1984-10-16
Abstract
No abstract record available.
Inventors
- 👤 Adolf W Lohmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:36
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/42; G02B27/46; G06; G06V; G06V10/00; G06V10/88; G06V10/89; G06V10/893; G06V10/895
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
AN OPTICAL CHARACTER RECOGNITION SYSTEM COMPRISING: A FIRST OPTICAL MEANS FOR FORMING A FRAUNHOFER DIFFRACTION PATTERN OF A FIRST CHARACTER; MEANS FOR RANDOMIZING THE PHASE OF THE LIGHT OF SAID DIFFRACTION PATTERN, SAID RANDOMIZING MEANS BEING POSITIONED AT THE DIFFRACTION PATTERN; MEANS FOR COLLIMATING THE LIGHT FROM SAID RANDOMIZING MEANS AND DIRECTING THE LIGHT TO A SECOND CHARACTER; SECOND OPTICAL MEANS FOR FORMING A FRAUNHOFER DIFFRACTION PATTERN OF THE LIGHT RECEIVED FROM SAID SECOND CHARACTER; AND MEANS FOR DETECTING THE INTENSITY OF THE LIGHT AT THE CENTER OF THE DIFFRACTION PATTERN FORMED BY SAID SECOND OPTICAL MEANS; WHEREBY THE SIMILARITY OR DISSIMILARITY BETWEEN SAID SECOND CHARACTERS CAN BE DETECTED.
Claim 2
Dependent Claim
109 words
AN OPTICAL CHARACTER RECOGNITION SYSTEM COMPRISING: A FIRST OPTICAL MEANS FOR FORMING A FRAUNHOFER DIFFRACTION PATTERN OF A FIRST CHARACTER; MEANS FOR RANDOMIZING THE PHASE OF THE LIGHT OF SAID DIFFRACTION PATTERN, SAID RANDOMIZING MEANS BEING POSITIONED AT THE DIFFRACTION PATTERN; MEANS FOR COLLIMATING THE LIGHT FROM SAID RANDOMIZING MEANS AND DIRECTING THE LIGHT TO A SECOND CHARACTER; SECOND OPTICAL MEANS FOR FORMING A FRAUNHOFER DIFFRACTION PATTERN OF THE LIGHT RECEIVED FROM SAID SECOND CHARACTER; AND MEANS FOR DETECTING THE INTENSITY OF THE LIGHT AT THE CENTER OF THE DIFFRACTION PATTERN FORMED BY SAID SECOND OPTICAL MEANS; WHEREBY THE SIMILARITY OR DISSIMILARITY BETWEEN SAID SECOND CHARACTERS CAN BE DETECTED.
References Cited (Backward Citations)
US3196392A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-07 | 1972-10-07 | 1973-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-07 | 1976-10-07 | 1977-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-07 | 1980-10-07 | 1981-04-08 | $7700.00 | Window Closed / Lapsed |