Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1978-06-05
1981-08-25
Ansher, Bernard
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1606
Patent
active
D02604027
REFERENCES:
patent: D195998 (1963-08-01), Aubock
patent: D229581 (1973-12-01), Armbruster et al.
patent: D234369 (1975-02-01), Aalen
patent: D252276 (1979-07-01), Griffith
patent: 3458244 (1969-07-01), Klein
patent: 3798435 (1974-03-01), Schindl
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