Microform viewer
US4054373A · kind A · utility
1Cited by
5References
9Claims
0Family size
Inventors
Key dates
| Filing date | Feb 17, 1976 |
| Grant date | Oct 18, 1977 |
| Priority date | — |
| Expiry date | Feb 17, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/04
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
This invention is a portable hand operated viewer for micro-fiches and other material with writing too small to be read by the unaided eye. A translucent table has a clamp for the reading matter and that carries an adjustable binocular lens unit, with a head piece for correct location and for movement to scan the table. It is cheap and can be assembled by a child and is suitable for use in schools.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.