Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1981-11-30
1984-02-14
Holtje, Nelson C.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D14 11, D1699
Patent
active
D02726335
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), Krehebiel
patent: 4212389 (1980-07-01), Robbins
patent: 4221479 (1980-09-01), Harvey
Holtje Nelson C.
Murphy Bernard J.
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