Viewer

Details Viewer Viewer

1979-12-26

1981-03-10

Stephan, Steven L.

Optics: image projectors

Selective data retrieval

Film strip

242180, 242181, 352 78R, 353108, 353DIG2, G03B 2312, G03B 158, G03B 2102

Patent

active

042550262

ABSTRACT:
A device is disclosed for use by a person for viewing material on film in a cartridge comprising a viewing screen, a projection module, a cartridge module, a lens system, a gear system for advancing the film, and a gear system for reversing the film.

REFERENCES:
patent: 3480354 (1969-11-01), Fukuda
patent: 3679298 (1972-07-01), Knowles et al.
patent: 3690751 (1972-09-01), Von Fischern et al.
patent: 3992088 (1976-11-01), Blanke
patent: 4076397 (1978-02-01), Becker

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