Microfilm reader

Details Microfilm reader Microfilm reader

1980-06-23

1982-10-05

Holtje, Nelson C.

Photography and optical equipment

Projector or viewer

With provision for transparency magazine

D1603

Patent

active

D02664291

REFERENCES:
patent: D195908 (1963-08-01), Sigmond
patent: D201719 (1965-07-01), Haupt
patent: D250266 (1978-11-01), Overman
patent: 2258382 (1941-10-01), Goebel
patent: 2562297 (1951-07-01), Cordonnier
patent: 3377915 (1968-04-01), Buckett
patent: 3535031 (1970-10-01), Spreitzer
patent: 4312578 (1982-01-01), Wells et al.

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