Photographic sheet materials cassette

Details Photographic sheet materials cassette Photographic sheet materials cassette

1981-11-30

1984-02-07

Holtje, Nelson C.

Photography and optical equipment

Projector or viewer

With provision for transparency magazine

D14 11, D1699

Patent

active

D02725428

REFERENCES:
patent: D200505 (1965-03-01), Zimmerman
patent: D211134 (1968-05-01), Robbins
patent: D216281 (1969-12-01), Moyroud
patent: D218806 (1970-09-01), Berg
patent: D221999 (1971-09-01), Steinberg
patent: D227263 (1973-06-01), Allison
patent: 3342431 (1967-09-01), Mouissie
patent: 3856394 (1974-12-01), Linde
patent: 4166588 (1979-09-01), Krehbiel
patent: 4212389 (1980-07-01), Robbins
patent: 4221479 (1980-09-01), Harvey

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