Filter apparatus for retinoscope
US5200772A · kind A · utility
20Cited by
1References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 11, 1991 |
| Grant date | Apr 6, 1993 |
| Priority date | — |
| Expiry date | Sep 11, 2011 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B3/1208
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A retinoscope is provided with a hinged light filter carrier assembly for slidably positioning first and second polarizing filters in the light transmission and viewing passageways. A single actuating lever is provided to move the light filter members into operative position and to retract them out of alignment with the viewing passageways.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.