Patent US3155818A successfully refreshed from Google Patents.
US3155818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Error-correcting systems
Assignee: AT&T Inc
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Filing: 1961-05-15
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Granted: 1964-11-03
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Expires: 1981-05-15
Abstract
No abstract record available.
Inventors
- 👤 Frank M Goetz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:16
CPC Classifications
H; H03; H03M; H03M13/00; H03M13/33; H03M13/03; H03M13/05; H03M13/13; H03M13/15
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
IN COMBINATION IN A SELF-CORRECTING BINARY INFORMATION SYSTEM WHICH INCLUDES A TRANSMISSION CHANNEL SUBJECT TO ERROR BURSTS, AN ENCODER COMPRISING MEANS FOR SUPPLYING INFORMATION DIGITS, MEANS FOR TIMING SAID SUPPLYING MEANS AND FOR PROVIDING SYNCHRONIZATION DIGITS, FIRST SHIFT REGISTER MEANS RESPONSIVE TO THE OUTPUT OF SAID SUPPLYING MEANS FOR SERIALLY APPLYING SAID INFORMATION DIGITS TO SAID CHANNEL, MEANS FOR GENERATING CHECK DIGITS AND FOR SERIALLY APPLYING SAID CHECK DIGITS TO SAID FIRST SHIFT REGISTER MEANS FOR APPLICATION TO SAID CHANNEL, SAID GENERATING MEANS INCLUDING SECOND SHIFT REGISTER MEANS FOR PROVIDING A BINARY SEQUENCE WHICH INCLUDES AT LEAST ONE "O" AND ONE "1", SAID GENERATING MEANS ALSO INCLUDING MODULO 2 ADDING MEANS SUCCESSIVELY RESPONSIVE TO THE OUTPUT OF SAID SECOND SHIFT REGISTER MEANS AND THE INFORMATION DIGIT APPEARING IN AT LEAST ONE STAGE OF SAID FIRST SHIFT REGISTER MEANS FOR GENERATING SAID CHECK DIGITS
Claim 2
Dependent Claim
143 words
IN COMBINATION IN A SELF-CORRECTING BINARY INFORMATION SYSTEM WHICH INCLUDES A TRANSMISSION CHANNEL SUBJECT TO ERROR BURSTS, AN ENCODER COMPRISING MEANS FOR SUPPLYING INFORMATION DIGITS, MEANS FOR TIMING SAID SUPPLYING MEANS AND FOR PROVIDING SYNCHRONIZATION DIGITS, FIRST SHIFT REGISTER MEANS RESPONSIVE TO THE OUTPUT OF SAID SUPPLYING MEANS FOR SERIALLY APPLYING SAID INFORMATION DIGITS TO SAID CHANNEL, MEANS FOR GENERATING CHECK DIGITS AND FOR SERIALLY APPLYING SAID CHECK DIGITS TO SAID FIRST SHIFT REGISTER MEANS FOR APPLICATION TO SAID CHANNEL, SAID GENERATING MEANS INCLUDING SECOND SHIFT REGISTER MEANS FOR PROVIDING A BINARY SEQUENCE WHICH INCLUDES AT LEAST ONE "O" AND ONE "1", SAID GENERATING MEANS ALSO INCLUDING MODULO 2 ADDING MEANS SUCCESSIVELY RESPONSIVE TO THE OUTPUT OF SAID SECOND SHIFT REGISTER MEANS AND THE INFORMATION DIGIT APPEARING IN AT LEAST ONE STAGE OF SAID FIRST SHIFT REGISTER MEANS FOR GENERATING SAID CHECK DIGITS
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) | 1967-11-03 | 1968-05-04 | 1968-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-03 | 1972-05-04 | 1972-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-03 | 1976-05-04 | 1976-11-03 | $7700.00 | Window Closed / Lapsed |