Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1980-02-27
1982-04-20
Sebastian, Leland A.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1603
Patent
active
D02639629
REFERENCES:
patent: D157515 (1950-02-01), Perzentka
patent: D234005 (1974-12-01), Yagi et al.
patent: 4279504 (1981-07-01), Brown et al.
Sebastian Leland A.
Sharp Corporation
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