US3566351A
Expired / Lapsed
US
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Data communication apparatus
Assignee: Momentum Systems Corp
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Filing: 1967-05-05
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Granted: 1971-02-23
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Expires: 1987-05-05
Abstract
Abstract DATA COMMUNICATION APPARATUS FOR USE WITH STANDARD COMMUNICATION TERMINAL FACILITIES AND OPERABLE AS EITHER A TRANSMITTER OR RECEIVER. THE APPARATUS PROVIDES A SYNCHRONIZING SYSTEM THAT IS MORE TOLERANT OF LINE DISTORTIONS THAN OTHER KNOWN ASYNCHRONOUS EQUIPMENT. SYNCHRONIZATION OF THE RECEIVER''S OSCILLATOR WITH THAT OF THE TRANSMITTER OCCURS WHENEVER THERE IS A POSITIVE OR NEGATIVE CHANGE IN THE DATA BEING RECEIVED. SPECIAL TRANSMISSION CODES ARE EMPLOYED TO GUARANTEE CHANGES AT INTERVALS OF NO MORE THAN FOUR BIT TIMES. THE SPECIAL CODES ALSO PROVIDE A MEANS FOR MAKING EFFECTIVE ALPHA AND NUMERIC VALIDITY CHECKS AND RESULT IN INCREASED DATA TRANSMISSION SPEEDS.
Inventors
- 👤 Torkjell Sekse
- 👤 Walter Banziger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:42
CPC Classifications
G; G06; G06F; G06F11/00; G06F11/07; G06F11/08; H; H04; H04L; H04L7/00; H04L7/02; H04L7/033
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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |