Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1978-06-07
1981-10-20
Kemper, Catherine E.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1601
Patent
active
D02613948
REFERENCES:
patent: D100563 (1936-07-01), Hornung et al.
patent: D198727 (1964-07-01), Conner et al.
patent: 3295426 (1967-01-01), Land et al.
patent: 4146320 (1979-03-01), Schrader
patent: 4175847 (1979-11-01), Schrader
Kemper Catherine E.
Plaubel, Feinmechanik & Optik GmbH
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