Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1977-01-10
1978-10-03
Burke, Wallace R.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1606
Patent
active
D02497964
REFERENCES:
patent: 2872844 (1959-02-01), Van Tuyl
patent: 3553866 (1971-01-01), Redford et al.
Burke Wallace R.
Kemper Catherine
Leonard Henry K.
Penton/IPC, Inc.
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