Combined ruler and electronic calculator
USD271025S · kind S · design
22Cited by
11References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 29, 1982 |
| Grant date | Oct 18, 1983 |
| Priority date | — |
| Expiry date | Oct 18, 1997 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.