Microfilm reader

Details Microfilm reader Microfilm reader

1984-12-21

1987-06-09

Holtje, Nelson C.

Photography and optical equipment

Projector or viewer

With provision for transparency magazine

D16 14

Patent

active

D02902648

REFERENCES:
patent: D197613 (1964-03-01), Hoppmann
patent: D266429 (1982-10-01), Overman
patent: 2258382 (1941-10-01), Goebel
patent: 2712266 (1955-07-01), Cherouvrier
patent: 3357769 (1967-12-01), Thompson
patent: 4312578 (1982-01-01), Wells
patent: 4618232 (1986-10-01), Wells

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