Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1984-06-04
1987-04-07
Holtje, Nelson C.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D16 1
Patent
active
D02891751
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patent: D154985 (1949-08-01), Bouch et al.
patent: D221025 (1971-06-01), Fukuda
patent: D223409 (1972-04-01), Fukuda
patent: D247852 (1978-05-01), Fukuda
patent: D279573 (1985-07-01), Agou
patent: D284579 (1986-07-01), Io
patent: D284768 (1986-07-01), Nakayama
patent: D285449 (1986-09-01), Soda
Holtje Nelson C.
Nippon Kogaku K.K.
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