Key matrix for a telephone handset
USD421992S · kind S · design
49Cited by
34References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 9, 1997 |
| Grant date | Mar 28, 2000 |
| Priority date | — |
| Expiry date | Mar 28, 2014 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.