Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1976-08-16
1978-02-14
Burke, Wallace R.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1605, D0302
Patent
active
D02472449
REFERENCES:
patent: D223637 (1972-05-01), Mazur
patent: 3870209 (1975-03-01), Mazur
patent: 3910470 (1975-10-01), Swenson et al.
patent: 3912137 (1975-10-01), Tomatsuri
Burke Wallace R.
Kemper Catherine E.
Warren Manfred M.
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