Patent US3564557A successfully refreshed from Google Patents.
US3564557A
Expired / Lapsed
US
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Self-clocking recording
Assignee: Honeywell Inc
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Filing: 1968-05-21
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Granted: 1971-02-16
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Expires: 1988-05-21
Abstract
Abstract A SERIAL CODING ARRANGEMENT FOR BINARY INFORMATION IS DESCRIBED FOLLOWING THE REQUIREMENT THAT AT LEAST EVERY OTHER BIT POSITION CONTAINS A SIGNAL TRANSITION. TO ACHIEVE THIS, A CODING SCHEME IS USED IN WHICH THREE OF THE POSSIBLE CONFIGURATIONS OF TWO BINARY BITS OF INFORMATION ARE ENCODED AS THREE UNIQUE THREE BIT CONFIGURATIONS AND THE FOURTH TWO BIT CONFIGURATION IS ENCODED ALONG WITH THE FOLLOWING TWO BITS OF BINARY INPUT INFORMATION IN ONE OF FOUR UNIQUE SIX BIT CONFIGURATIONS. THIS COULD BE DESCRIBED AS VARIABLE LENGTH CODING AND IMPLEMENTATION ARRANGEMENTS FOR BOTH THE ENCODING AND DECODING ARE DISCLOSED.
Inventors
- 👤 Leonard B Ruthazer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:00
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; G11B20/14; G11B20/1403; G11B20/1423; G11B20/1426
Claims Analysis
Total Claims: 0
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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) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |