Keyboard for a calculator or a combined calculator and watch or similar article
USD243751S · kind S · design
9Cited by
4References
1Claims
0Family size
Inventors
Key dates
| Filing date | Mar 6, 1975 |
| Grant date | Mar 22, 1977 |
| Priority date | — |
| Expiry date | Mar 22, 1991 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.