Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1976-07-12
1977-07-19
Ansher, Bernard
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1606
Patent
active
D02450810
REFERENCES:
patent: D184881 (1959-04-01), Maguire
patent: D240268 (1976-06-01), Huckenbeck
patent: D241166 (1976-06-01), Huckenbeck
Ansher Bernard
Fishburn Claude A.
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