Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1976-09-22
1979-01-02
Burke, Wallace R.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1603
Patent
active
D02506785
REFERENCES:
patent: D217192 (1970-04-01), Zemblowski
patent: D240161 (1976-06-01), Hall
patent: 3533689 (1970-10-01), Smith et al.
patent: 3692399 (1972-09-01), Stewart
patent: 3997258 (1976-12-01), Omi
Burke Wallace R.
Hodson Gordon W.
Kemper Catherine
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