Direct opposite reverse refractor
US4572622A · kind A · utility
4Cited by
2References
4Claims
0Family size
Inventor
Key dates
| Filing date | Jul 30, 1984 |
| Grant date | Feb 25, 1986 |
| Priority date | — |
| Expiry date | Jul 30, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B3/12
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
This invention consists of a geometrically patterned lens for primary uses in the field of image projection and refraction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.