Microfilm reader

Details Microfilm reader Microfilm reader

1980-11-10

1982-12-07

Holtje, Nelson C.

Photography and optical equipment

Projector or viewer

With provision for transparency magazine

D16 18, D1603

Patent

active

D02671808

REFERENCES:
patent: D197866 (1964-03-01), Hockenberry
patent: D224056 (1972-06-01), Onozaki
patent: D226357 (1973-02-01), Peters
patent: D236544 (1975-08-01), Kuypers
patent: D247498 (1978-03-01), Persha
patent: 3319517 (1967-05-01), Rondas
patent: 3498707 (1970-03-01), Allen
patent: 3739069 (1973-06-01), Sandmeier

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