Photographic enlarging apparatus

Details Photographic enlarging apparatus Photographic enlarging apparatus

1981-12-14

1983-12-13

Holtje, Nelson C.

Photography and optical equipment

Projector or viewer

With provision for transparency magazine

D1603

Patent

active

D02717743

REFERENCES:
patent: D99422 (1936-04-01), Teague
patent: D111244 (1938-09-01), Fassin
patent: D239206 (1976-03-01), Valle
patent: D260903 (1981-09-01), Overman
patent: 3522991 (1970-08-01), Bowen
patent: 3767301 (1973-10-01), Solo
patent: 4235543 (1980-11-01), Norris

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