US3566280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital communications clock synchronizer for responding to pulses of predetermined width and further predictable pulses of sufficient energy level during particular interval
Assignee: Lockheed Martin Corp
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Filing: 1969-03-07
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Granted: 1971-02-23
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Expires: 1989-03-07
Abstract
Abstract THE DISCLOSURE IS DIRECTED TO LOGIC APPARATUS USED IN CONJUNCTION WITH A DIGITAL COMMUNICATIONS RECEIVER, AND EMPLOYED TO ESTABLISH WHEN CORRECT PULSES, KNOWN AS SUPERVISORY PULSES, ARE BEING RECEIVED FROM ANOTHER COMMUNICATIONS SYSTEM OR FROM ANOTHER UNIT OF THE SAME SYSTEM. OUR DEVICE LOOKS FOR A FIRST PULSE OF THE CORRECT WIDTH, AND BY VIRTUE OF BEING ABLE TO PREDICT WHEN SUBSEQUENT CORRECT PULSES WOULD BE RECEIVED, IS ABLE TO ESTABLISH IF SYNCHRONIZATION EXISTS. IF IT DOES EXIST, OUR DEVICE THEN PROVIDES A CLOCK SIGNAL TO THE RELATED DIGITAL COMCOMMUNICATIONS RECEIVER WHICH IS THEN IN FREQUENCY AND IN PHASE WITH THE CLOCK OF THE OTHER COMMUNICATIONS UNIT.
Inventors
- 👤 David L Emmons
- 👤 Russel James Breiding Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:04
CPC Classifications
H; H04; H04L; H04L7/00; H04L7/0079; H04L7/0083
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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 |