US3562649A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for redundant time measurement
Assignee: United States Department of the Navy
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Filing: 1968-06-12
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Granted: 1971-02-09
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Expires: 1988-06-12
Abstract
Abstract A PERIOD OF TIME MEASURED BY GENERATING A PLURALITY OF NOISE SIGNALS BY MEANS OF A PLURALITY OF INDEPENDENT WHITE GAUSSIAN NOISE GENERATORS, BY BAND-LIMITING EACH NOISE SIGNALS WITH SUITABLE FILTERS, BY SUMMING THE NOISE SIGNALS EMERGENT FROM SAID FILTERS, AND FINALLY BY AMPLITUDE-LIMITING THE SUN SIGNALS, THEREBY PRODUCING A SIGNAL WHOSE AMPLITUDE AND NUMBER OF ZERO-CROSSINGS ARE BOTH INDEPENDENT OF THE NUMBER OF NOISE GENERATORS EMPLOYED. THE ELAPSED TIME IS MEASURED BY COUNTING THE ZERO CROSSINGS.
Inventors
- 👤 Eric J Hoffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:47
CPC Classifications
G; G04; G04F; G04F10/00
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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |