US3242461A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Error detection system
Assignee: AT&T Teletype Corp
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Filing: 1961-12-28
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Granted: 1966-03-22
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Expires: 1981-12-28
Abstract
No abstract record available.
Inventors
- 👤 Silberg Sylvan
- 👤 Ransom D Slayton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:58
CPC Classifications
H; H04; H04L; H04L1/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
181 words
IN A COMMUNICATION SYSTEM HAVING ERROR DETECTION AND CORRECTION FACILITIES WHEREIN A PLURALITY OF CODE BITS HAVING DIFFERENT POLARITIES ARE PERMUTATIVELY COMBINED TO REPRESENT A CHARACTER AND A PREDETERMINED NUMBER OF CHARACTERS CONSTITUTE A MESSAGE BLOCK, AN ERROR DETECTION AND CORRECTION SYSTEM COMPRISING, MEANS FOR SENSING A MESSAGE TAPE AND FOR TRANSMITTING SAID CODE BITS, A COUNTING MEANS MONITORING SAID TRANSMITTING MEANS AND COUNTING THE CODE BITS OF ONE POLARITY OVER A MESSAGE BLOCK A RECEIVING MEANS INCLUDING MEANS FOR RECORDING SAID CODE BITS IN RECORDING MEDIUM, A COUNTING MEANS MONITORING SAID RECEIVING MEANS AND COUNTING SAID CODE BITS OF SAID ONE POLARITY IN A MESSAGE BLOCK, DELETING MEANS OPERABLE IN SYNCHRONISM WITH SAID RECORDING MEANS TO EFFECTIVELY DELETE A MESSAGE BLOCK CONTAINING AN ERROR, AND MEANS FOR COMPARING THE COUNTS OF SAID COUNTING MEANS AND, UPON DISAGREEMENT OF SAID COUNTS, FOR INITIATING THE SIMULTANEOUS DELETION BY SAID DELETING MEANS, OF THE MASSAGE BLOCK IN THE RECORD MEDIUM CONTAINING AN ERROR AND FOR RE-RECORDING OF THE TRANSMITTED MESSAGE BLOCK BY THE RECORDING MEANS IN A DIFFERENT PORTION OF SAID RECORDING MEDIUM.
Claim 2
Dependent Claim
181 words
IN A COMMUNICATION SYSTEM HAVING ERROR DETECTION AND CORRECTION FACILITIES WHEREIN A PLURALITY OF CODE BITS HAVING DIFFERENT POLARITIES ARE PERMUTATIVELY COMBINED TO REPRESENT A CHARACTER AND A PREDETERMINED NUMBER OF CHARACTERS CONSTITUTE A MESSAGE BLOCK, AN ERROR DETECTION AND CORRECTION SYSTEM COMPRISING, MEANS FOR SENSING A MESSAGE TAPE AND FOR TRANSMITTING SAID CODE BITS, A COUNTING MEANS MONITORING SAID TRANSMITTING MEANS AND COUNTING THE CODE BITS OF ONE POLARITY OVER A MESSAGE BLOCK A RECEIVING MEANS INCLUDING MEANS FOR RECORDING SAID CODE BITS IN RECORDING MEDIUM, A COUNTING MEANS MONITORING SAID RECEIVING MEANS AND COUNTING SAID CODE BITS OF SAID ONE POLARITY IN A MESSAGE BLOCK, DELETING MEANS OPERABLE IN SYNCHRONISM WITH SAID RECORDING MEANS TO EFFECTIVELY DELETE A MESSAGE BLOCK CONTAINING AN ERROR, AND MEANS FOR COMPARING THE COUNTS OF SAID COUNTING MEANS AND, UPON DISAGREEMENT OF SAID COUNTS, FOR INITIATING THE SIMULTANEOUS DELETION BY SAID DELETING MEANS, OF THE MASSAGE BLOCK IN THE RECORD MEDIUM CONTAINING AN ERROR AND FOR RE-RECORDING OF THE TRANSMITTED MESSAGE BLOCK BY THE RECORDING MEANS IN A DIFFERENT PORTION OF SAID RECORDING MEDIUM.
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) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |