Photographic masking and enlarging easel

Details Photographic masking and enlarging easel Photographic masking and enlarging easel

1985-09-20

1988-10-18

Holtje, Nelson C.

Photography and optical equipment

Projector or viewer

With provision for transparency magazine

D16 29X

Patent

active

D02981424

REFERENCES:
patent: D123245 (1940-10-01), Moore
patent: D147317 (1947-08-01), Breen
patent: 1728102 (1929-09-01), Caps
patent: 2166878 (1939-07-01), Rodriguez
patent: 2256894 (1944-09-01), Chadkin
patent: 3371576 (1968-03-01), Miller
patent: 4150895 (1979-04-01), Northrup
patent: 4190357 (1980-02-01), Kostiner

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