Patent US4255801A successfully refreshed from Google Patents.
US4255801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic watch
Assignee: Citizen Watch Co Ltd
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Filing: 1979-04-04
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Granted: 1981-03-10
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Expires: 1999-04-04
Abstract
Abstract An electronic watch comprising a timepiece circuit consisting of a reference oscillation source, a frequency divider and a display driving circuit, a display device connected to an output of said timepiece circuit, a power supply driving said timepiece circuit, an external actuator operating said timepiece circuit from the exterior of the watch, an outer case consisting of a case and a band, and a flexible hinge making the case integral with the band whereby there may be provided a useful and functional watch which is small in size and thin, and have no shortcoming such as a tendency for disconnection and erroneous wiring.
Inventors
- 👤 Sadao Ode
- 👤 Toshikazu Hatuse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:41
CPC Classifications
G; G04; G04G; G04G9/00; G04G9/0064; G04G9/007; A; A44; A44C; A44C5/00; A44C5/14; G04C; G04C3/00; G04C3/001
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
193 words
An electronic watch with a calculation function comprising: (a) a timepiece circuit having a reference oscillation source, a frequency divider and a time display driving circuit; (b) a computation circuit for performing the calculation function having a computation display driving circuit; (c) a display device connected to said time display driving circuit and said computation display driving circuit for displaying a time and a calculation solution; (d) an external operating member controlling said timepiece circuit and said computation circuit; (e) an outer casing comprising a case and a band; (f) an integral flexible hinge connecting said case and said band such that said case is integral with said band; (g) a conductive patterned film sheet integrally located within said flexible hinge, said case and the band; (h) a power supply source supplying energy through said conductive patterned film sheet to said timepiece circuit and said computation circuit; and (i) the electronic watch wherein said flexible hinge, said band and said case are comprised of an integral portion of a high molecular weight polymer which has a narrow region located between said case and said band which flexes and functions as said flexible hinge.
Claim 2
Dependent Claim
193 words
An electronic watch with a calculation function comprising: (a) a timepiece circuit having a reference oscillation source, a frequency divider and a time display driving circuit; (b) a computation circuit for performing the calculation function having a computation display driving circuit; (c) a display device connected to said time display driving circuit and said computation display driving circuit for displaying a time and a calculation solution; (d) an external operating member controlling said timepiece circuit and said computation circuit; (e) an outer casing comprising a case and a band; (f) an integral flexible hinge connecting said case and said band such that said case is integral with said band; (g) a conductive patterned film sheet integrally located within said flexible hinge, said case and the band; (h) a power supply source supplying energy through said conductive patterned film sheet to said timepiece circuit and said computation circuit; and (i) the electronic watch wherein said flexible hinge, said band and said case are comprised of an integral portion of a high molecular weight polymer which has a narrow region located between said case and said band which flexes and functions as said flexible hinge.
Claim 3
Dependent Claim
25 words
The electronic watch as claimed in claim 1 wherein further said band is provided with operation keys delivering a timepiece signal and a computation signal.
Claim 4
Dependent Claim
23 words
The electronic watch as claimed in claim 2 wherein said conductive patterned film sheet electrically connects said display device and said operation keys.
Claim 5
Dependent Claim
18 words
The electronic watch as claimed in claims 1 or 3 wherein the high molecular weight polymer is polypropylene.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-09 | 1984-09-08 | 1985-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-09 | 1988-09-08 | 1989-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-09 | 1992-09-08 | 1993-03-10 | $7700.00 | Window Closed / Lapsed |