Patent US3563664A successfully refreshed from Google Patents.
US3563664A
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US
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Method and apparatus for resolving transducer ambiguity
Assignee: Individual
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Filing: 1967-11-09
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Granted: 1971-02-16
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Expires: 1987-11-09
Abstract
Abstract A METHOD AND APPARATUS FOR RESOLVING AMBIGUITY IN THE OUTPUT OF CIRCULAR FUNCTION TRANSDUCERS BY GENERATING A SIGNAL IN QUADRATURE WITH THE ORIGINAL TRANSDUCER OUTPUT IS DISCLOSED.
Inventors
- 👤 James W Campbell
- 👤 Virgil Erbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:42
CPC Classifications
G; G01; G01B; G01B9/00; G01B9/02; G01B9/02055; G01B9/02075; G01B9/02078; G01B9/02079
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 |