Keyboard switch with a mesh of fibers
US4553820A · kind A · utility
9Cited by
6References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 27, 1983 |
| Grant date | Nov 19, 1985 |
| Priority date | — |
| Expiry date | Jul 27, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2219/012
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
This invention discloses a keyboard switch with display function composed of two transparent sheets constituting a pressure operable switch and placed on a display unit. The upper of two transparent sheets is provided with an unflat top surface for avoiding unnecessary reflection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.