Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1977-06-29
1980-01-29
Burke, Wallace R.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1605
Patent
active
D02540770
REFERENCES:
patent: D246528 (1977-11-01), Miller
patent: 4019710 (1977-04-01), O'Connor et al.
Burke Wallace R.
Groff Emory L.
Kemper Catherine
R. E. Miller Pty. Limited
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