Keyboard and key and telephone apparatus with such a keyboard
US6677541B1 · kind B1 · utility
5Cited by
13References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 23, 1998 |
| Grant date | Jan 13, 2004 |
| Priority date | — |
| Expiry date | Jan 22, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2239/05
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A keyboard having keys for inputting characters, wherein a key is arranged to produce a character in response to the press of the key once. The key (30) has a main contact (31) which is always activated when the key (30) is pressed. Also the key has at least one edge contact (32, 33), which is activated, in addition to the main contact (31), when the key (30) is pressed at the point or close to the point of the edge contact (32, 33). The activation of predetermined contacts correspond to the inputting of a predetermined character.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.