US3162837A
Expired / Lapsed
US
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Error correcting code device with modulo-2 adder and feedback means
Assignee: International Business Machines Corp
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Filing: —
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Granted: 1964-12-22
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Expires: 1981-12-22
Abstract
No abstract record available.
Inventors
- 👤 John E Meggitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:23
CPC Classifications
H; H04; H04L; H04L1/00; H04L1/004; H04L1/0056; H04L1/0057; H03; H03M; H03M13/00; H03M13/03; H03M13/05; H03M13/13
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
99 words
AN ENCODER CORRECTING DATA TRANSMISSION DEVICE INCLUDING A DECODER FOR RECEIVING TRANSMITTED BINARY DATA DIGITS AND BINARY CHECK DIGITS, SAID DECODER COMPRISING A SHIFT REGISTER CONNECTED TO RECEIVE BOTH DATA DIGITS AND CHECK DIGITS SERIALLY, ADDING MEANS CONNECTED TO SAID SHIFT REGISTER TO DEVELOP A MODULO TWO SUM OF DIGITS APPEARING IN SELECTED STAGES OF SAID SHIFT REGISTER, DETECTING MEANS RESPONSIVE TO SUCCESSIVE VALUES OF SAID SUM AND THE VALUES OF DATA DIGITS RECEIVED, AND INVERTING MEANS CONNECTED TO RECEIVE THE OUTPUT OF SAID SHIFT REGISTER AND TO INVERT A DIGIT OUTPUT WHENEVER SAID DETECTING MEANS DETECTS AN ERROR.
References Cited (Backward Citations)
US2956124A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-12-22 | 1968-06-22 | 1968-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-22 | 1972-06-22 | 1972-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-22 | 1976-06-22 | 1976-12-22 | $7700.00 | Window Closed / Lapsed |