Digital display apparatus
US4539768A · kind A · utility
15Cited by
4References
8Claims
0Family size
Inventor
Key dates
| Filing date | Jun 15, 1984 |
| Grant date | Sep 10, 1985 |
| Priority date | — |
| Expiry date | Jun 15, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09F7/02
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The digital display apparatus comprises a board having one or more seven-element digital-type displays marked thereon. A flap is provided for each of the elements and is pivotable from a first position in which the associated element is exposed, to a second position in which it covers its associated element. Selective pivoting of the flaps enables each display to form any required digit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.