Electronic calculator watch
US4268913A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 13, 1977 |
| Grant date | May 19, 1981 |
| Priority date | — |
| Expiry date | May 13, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2300/016
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An electronic calculator watch which comprises timekeeping means composed of an oscillator, a frequency divider connected to the oscillator, a counter circuit connected to the frequency divider, and a driver circuit connected to the counter circuit for providing an output signal indicative of time information, and calculating means composed of an oscillator circuit and a calculation circuit responsive to perform calculations under control of numerical inputs furnished by external operation device provided on a watch case. The watch also comprises a display including a first display section connected to the driver circuit of the timekeeping means to display the output signal delivered therefrom, and a second display section connected to the calculating means to display the result of calculations, each of the first and second display sections having a plurality of digit electrodes and a plurality of segment electrodes arranged in a matrix configuration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.