Keyboard for a miniature calculator
US4292510A · kind A · utility
6Cited by
4References
12Claims
0Family size
Inventor
Key dates
| Filing date | Mar 15, 1979 |
| Grant date | Sep 29, 1981 |
| Priority date | — |
| Expiry date | Mar 15, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2003/127
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A calculator keyboard includes a face plate and a plurality of keys supported in a predetermined location with respect to the face plate. In the face plate there are provided narrow recesses in alignment with respective keys. Each recess has a width dimension sufficient for providing access to the associated key by a fingernail of the user.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.