Adjustable optical coupler device

Photography and optical equipment – Optical article not elsewhere specified

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D16 38, D1605

Patent

active

D02727455

REFERENCES:
patent: D167455 (1952-08-01), Gerhardt
patent: D197257 (1963-12-01), Fladlien et al.
patent: D248160 (1978-06-01), Feinbloom
patent: 2478545 (1949-08-01), Pearce
patent: 2940371 (1960-06-01), Thurow
patent: 4181419 (1980-01-01), Schlapp et al.
patent: 4188942 (1980-02-01), Fehlberg
patent: 4210133 (1980-06-01), Castaneda
patent: 4248213 (1981-02-01), Landre
patent: 4261345 (1981-04-01), Yamaguchi
patent: 4320951 (1982-03-01), Kawai

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