Slide viewing apparatus
US4218118A · kind A · utility
0Cited by
5References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 2, 1978 |
| Grant date | Aug 19, 1980 |
| Priority date | — |
| Expiry date | May 2, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B23/105
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A slide viewing apparatus having an enclosure with a projection screen and a projection system including a light source and lens for sequentially projecting images from a plurality of transparencies onto a mirror which reflects the images onto the screen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.