US3560998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronically controlled timepiece using low power mos transistor circuitry
Assignee: Hamilton Watch Co
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Filing: 1968-10-16
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Granted: 1971-02-02
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Expires: 1988-10-16
Abstract
Abstract THERE IS DISCLOSED HEREIN AN ELECTRONICALLY CONTROLLED TIMEPIECE SUITABLE FOR USE AS A WRIST WATCH EMPLOYING AN ELECTRONIC OSCILLATOR OPERATING AT A FREQUENCY SUBSTANTIALLY IN EXCESS OF THE DESIRED TIMEKEEPING RATE, FREQUENCY REDUCTION CIRCUITRY FORMED OF A SERIES OF TRANSISTOR STAGES OPERATIVE IN RESPONSE TO CHANGES IN VOLTAGE RATHER THAN CUR- RENT OR POWER LEVEL CHANGES TO PRODUCE TIMING SIGNAL OF THE REQUIRED FREQUENCY, ACTUATING MEANS RESPONSIVE TO THE TIMING SIGNAL AND A TIME DISPLAY OPERATED BY THE ACTUATING MEANS.
Inventors
- 👤 Richard S Walton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:57
CPC Classifications
G; G04; G04G; G04G3/00; G04G3/02
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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |