Interchangeable one dimensional convergence lens solar radiation intensification plate
USD245432S · kind S · design
2Cited by
5References
1Claims
0Family size
Inventor
Key dates
| Filing date | Dec 1, 1975 |
| Grant date | Aug 16, 1977 |
| Priority date | — |
| Expiry date | Aug 16, 1991 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.