Combined ruler and solar cell calculator
USD283515S · kind S · design
16Cited by
9References
1Claims
0Family size
Inventor
Key dates
| Filing date | Aug 2, 1983 |
| Grant date | Apr 22, 1986 |
| Priority date | — |
| Expiry date | Apr 22, 2000 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.