US3553711A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Echo measuring and recording
Assignee: Koden Electronics Co Ltd
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Filing: 1968-04-12
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Granted: 1971-01-05
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Expires: 1988-04-12
Abstract
Abstract ECHO RECEPTION SIGNALS RESULTING FROM THE TRANSMISSION OF DETECTION SIGNALS ARE RECEIVED BY A SECTOR-SCANNING RECEIVER AND SWITCHED AND APPLIED BY A SEQUENTIAL SWITCHING DEVICE DIRECTLY AS ANALOG SIGNALS SUCCESSIVELY AND TIMEDIVISIONALLY TO SEVERAL RECORDING MARKERS IN PARALLEL ARRANGEMENT TRANSVERSELY ACROSS A MOVING RECORDING PAPER, THE SWITCHING DEVICE BEING ACTIVATED BY SWITCHING SIGNALS GENERATED INTERRELATEDLY WITH THE DETECTION SIGNALS.
Inventors
- 👤 Shizuo Kurimura
- 👤 Kazuya Machida
- 👤 Tomio Hotta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:42
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/52; G01S7/56; G01S7/60; G01S15/00; G01S15/02; G01S15/06; G01S15/42
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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |