US4308608A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital electronic timepieces
Assignee: Denso Corp
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Filing: 1980-07-29
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Granted: 1981-12-29
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Expires: 2000-07-29
Abstract
Abstract In a digital electronic timepiece in which days of the week, hours and minutes are displayed on a display device and the displayed days of the week, hours and minutes can be corrected with a correction switch, a time correction switch is used to also correct a displayed day of the week.
Inventors
- 👤 Kozo Uga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:29
CPC Classifications
G; G04; G04G; G04G5/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
126 words
An electronic timepiece comprising a second counter, a minute counter, an hour counter which are connected in cascade, a time correction switch connected to receive a timing signal, a first transfer switch connected to apply said timing signal to said second counter and said minute counter, a day of the week counter, a differentiating circuit connected between said first transfer switch and ground, a second transfer switch for selectively connecting an input terminal of said day of the week counter between an output terminal of said hour counter and said differentiating circuit, a display device, and a third transfer switch for selectively connecting said display device between an output terminal of said day of the week counter and output terminals of said minute and hour counters.
Claim 2
Dependent Claim
126 words
An electronic timepiece comprising a second counter, a minute counter, an hour counter which are connected in cascade, a time correction switch connected to receive a timing signal, a first transfer switch connected to apply said timing signal to said second counter and said minute counter, a day of the week counter, a differentiating circuit connected between said first transfer switch and ground, a second transfer switch for selectively connecting an input terminal of said day of the week counter between an output terminal of said hour counter and said differentiating circuit, a display device, and a third transfer switch for selectively connecting said display device between an output terminal of said day of the week counter and output terminals of said minute and hour counters.
Claim 3
Dependent Claim
23 words
The electronic digital timepiece according to claim 2 which further comprises a decoder interposed between said display device and said third transfer switch.
Claim 4
Dependent Claim
21 words
The electronic digital timepiece according to claim 2 wherein said first, second and third transfer switches are interlocked with each other.
Claim 5
Dependent Claim
66 words
The electronic digital timepiece according to claim 2 wherein said first transfer switch comprises a pair of AND gate circuits with one input terminal of each connected to receive said timing signal and the other input terminal of each AND gate connected to receive respectively a control signal and its inverse provided by an inverter connected between the other input terminals of said AND gate circuits.
Claim 6
Dependent Claim
68 words
The electronic digital timepiece according to claim 2 wherein each of said second and third transfer switches comprises a pair of AND gate circuits with one input terminal of each connected to receive respectively a control signal and its inverse provided by an inverter connected between said input terminals, and an OR gate circuit with its input terminals connected to respective output terminals of said AND gate circuits.
References Cited (Backward Citations)
US3668859A
Cited
US3852950A
Cited
US3855780A
Cited
US3810356A
Cited
US4170870A
Cited
US4107915A
Cited
US3943696A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-12-28 | 1985-06-29 | 1985-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-28 | 1989-06-29 | 1989-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-28 | 1993-06-29 | 1993-12-29 | $7700.00 | Window Closed / Lapsed |