Watch display
US3958409A · kind A · utility
16Cited by
5References
9Claims
0Family size
Inventor
Key dates
| Filing date | Sep 12, 1974 |
| Grant date | May 25, 1976 |
| Priority date | — |
| Expiry date | Sep 12, 1994 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04G9/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A watch display includes first and second concentric circular arrays of light emitting diodes which are sequentially energized to indicate the minutes and hours such that only one diode from each array is energized at any one time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.