Key top
US4042090A · kind A · utility
17Cited by
11References
1Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Sep 17, 1974 |
| Grant date | Aug 16, 1977 |
| Priority date | — |
| Expiry date | Sep 17, 1994 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2219/034
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A key top comprises a key top base comprising a side portion and a top portion having a specified color, a colored portion provided at a part of the top portion and having a color different from the specified color of the top portion, and, a protective layer composed of a transparent material having an abrasion resistance and covering at least the colored portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.