US3213422A
Expired / Lapsed
US
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Control circuit for document reader
Assignee: Unisys Corp
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Filing: 1961-09-29
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Granted: 1965-10-19
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Expires: 1981-09-29
Abstract
No abstract record available.
Inventors
- 👤 Curtis W Fritze
- 👤 Herbert F Somermeyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:08
CPC Classifications
G; G06; G06V; G06V10/00; G06V10/10; G06V10/20; G06V10/28; G06V10/30
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
143 words
IN SYMBOL DETECTION AND RECOGNITION APPARATUS OF THE TYPE INCLUDING MEANS FOR PHOTOELECTRICALLY SCANNING A DOCUMENT, MEANS FOR DEVELOPING ELECTRICAL SIGNAL CHARACTERISTIC OF A SYMBOL BEING SCANNED, AND CATHODE-RAY TUBE MEANS RESPONSIVE TO SAID SIGNALS FOR REPRODUCING AT A REMOTE POINT THE CONFIGURATION OF SAID SYMBOL, MEANS FOR CONTROLLING SAID REPRODUCING MEANS COMPRISING: A PLURALITY OF CATHODE-RAY TUBES; SWEEP SIGNAL GENERATING MEANS CONNECTED TO SAID CATHODE-RAY TUBE MEANS; GATING MEANS HAVING FIRST AND SECOND INPUT TERMINALS AND AN OUTPUT TERMINAL; MEANS FOR APPLYING ELECTRICAL SIGNALS CHARACTERISTIC OF A SYMBOL BEING SCANNED TO SAID FIRST TERMINAL; SIGNAL CO,PARISON MEANS CONNECTED TO SAID OUTPUT TERMINAL FOR COMPARING SAID ELECTRICAL SIGNALS PASSING THROUGH SAID GATING MEANS TO A FIRST PREDTERMINED THRESHOLD; MEANS RSPONSIVE TO THE OUTPUT FROM SAID FIRST COMPARING MEANS OCCURRING WHEN SAID ELECTRICAL SIGNAL EXCEEDS SAID THRESHOLD FOR INITIATING SAID GENRATING MEANS; AND A
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-18 | 1969-04-19 | 1969-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-18 | 1973-04-19 | 1973-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-18 | 1977-04-19 | 1977-10-19 | $7700.00 | Window Closed / Lapsed |