Electroluminescent dial for an analog watch and process for making it
US4775964A · kind A · utility
65Cited by
10References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 11, 1988 |
| Grant date | Oct 4, 1988 |
| Priority date | — |
| Expiry date | Jan 11, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04B19/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An electroluminescent device adapted to serve as the dial of a conventional analog timepiece, with a central aperture for the stem carrying the timepiece hand and inscribed on the upper surface thereof with conventional time-indicating indicia, so that it can be read as a normal watch dial.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.