Multi-function lens
USD248590S · kind S · design
1Cited by
3References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 23, 1977 |
| Grant date | Jul 18, 1978 |
| Priority date | — |
| Expiry date | Jul 18, 1992 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.