US3613351A
Expired / Lapsed
US
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Wristwatch with liquid crystal display
Assignee: Hamilton Watch Co
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Filing: 1969-05-13
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Granted: 1971-10-19
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Expires: 1989-05-13
Abstract
Abstract DISCLOSED IS A LIQUID CRYSTAL DISPLAY AND POWER SUPPLY SYSTEM PARTICULARLY SUITED FOR A WRISTWATCH. A BAR SEGMENT DIGITAL DISPLAY IS SUBJECTED TO AN ELECTRIC FIELD TO ENERGIZE SELECTED PORTIONS OF THE DISPLAY IN ACCORDANCE WITH THE OUTPUT OF A TIMEKEEPING SOURCE WITHIN THE WATCH THE DISPLAY IS SEPARATELY POWERED EITHER FROM SOLAR CELLS OR FROM A PIEZOELECTRIC TRANSDUCER ACTUATED BY WATCH MOVEMENT.
Inventors
- 👤 Richard S Walton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:05
CPC Classifications
G; G04; G04C; G04C17/00; G04C10/00; G04C10/02; G04C3/00; G04C3/001; G04G; G04G9/00; G04G9/08; G04G9/12
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) | 1974-10-18 | 1975-04-19 | 1975-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-18 | 1979-04-19 | 1979-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-18 | 1983-04-19 | 1983-10-19 | $7700.00 | Window Closed / Lapsed |