Panoramic door viewer

Details Panoramic door viewer Panoramic door viewer

1990-04-10

1992-10-20

Word, A. Hugo

Photography and optical equipment

Optical article not elsewhere specified

D16135

Patent

active

D03303829

REFERENCES:
patent: D307153 (1990-04-01), Martin
patent: D310840 (1990-09-01), Degnan
patent: 3438540 (1969-04-01), Le Roy
patent: 3973835 (1976-08-01), Miyakawa et al.
patent: 4050792 (1977-09-01), Svensson
patent: 4172636 (1979-10-01), Yanagimachi
patent: 4175824 (1979-11-01), Daley
patent: 4251127 (1981-02-01), Yamaguchi
patent: 4269474 (1981-05-01), Kamimura
patent: 4348083 (1982-09-01), Kamimura
patent: 4726670 (1988-02-01), Sherrard
patent: 4730911 (1988-03-01), Wood et al.
patent: 4869021 (1989-09-01), Gregory
patent: 4892399 (1990-01-01), Ahn

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