US3732545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital display system
Assignee: Omron Corp
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Filing: 1970-12-24
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Granted: 1973-05-08
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Expires: 1990-12-24
Abstract
Abstract A digital display system for use in electronic calculating machines and having the features that the highest significant digit of the specific number entered in the calculator is displayed at the leftmost of a display window unit, with the least significant digit at the rightmost side and that unnecessary ''''0'''' figures other than those included in the specific number are erased.
Inventors
- 👤 I Hatano
- 👤 A Nagano
- 👤 K Koya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:30
CPC Classifications
G; G06; G06F; G06F15/00; G06F15/02; G06F3/00; G06F3/01; G06F3/02; G06F3/048; G06F3/0487; G06F3/0489; G06F3/14; G06F3/1407
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
198 words
A digital display system for use in an electronic calculator, comprising means for applying an electric signal representative of each digit entered in the calculator, a serial shift register, means for displaying the contents stored in said serial shift register, a serial index register having a Plurality of stages capable of storing one bit, the number of said stages corresponding to the number of stages of said serial shift register, means for applying index signals to the first stage of said index register, gate means for receiving the first mentioned electric signal and the output of the last stage of the index register and generating an output signal therefrom to the serial shift register, a control circuit for generating a control signal, means for applying the control signal generated in the control circuit, gate means for receiving the control signal and the output of the last stage of the index register and for supplying the output signal therefrom to the first stage of said index register, and inhibitor means adapted to inhibit the application of said output signal of the last stage of the index register in response to the control signal applied thereto from the control circuit.
Claim 2
Dependent Claim
198 words
A digital display system for use in an electronic calculator, comprising means for applying an electric signal representative of each digit entered in the calculator, a serial shift register, means for displaying the contents stored in said serial shift register, a serial index register having a Plurality of stages capable of storing one bit, the number of said stages corresponding to the number of stages of said serial shift register, means for applying index signals to the first stage of said index register, gate means for receiving the first mentioned electric signal and the output of the last stage of the index register and generating an output signal therefrom to the serial shift register, a control circuit for generating a control signal, means for applying the control signal generated in the control circuit, gate means for receiving the control signal and the output of the last stage of the index register and for supplying the output signal therefrom to the first stage of said index register, and inhibitor means adapted to inhibit the application of said output signal of the last stage of the index register in response to the control signal applied thereto from the control circuit.
Claim 3
Dependent Claim
53 words
A digital display system according to claim 1, further comprising a flip-flop electrically connected between the serial index register and the display means and operable to cause the display means to display the contents of the serial shift register only when an output is generated by the last stage of the index register.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |