Door viewer

Details Door viewer Door viewer

1994-05-02

1996-01-02

Coles, Doris V.

Photography and optical equipment

Optical article not elsewhere specified

Lens or objective

Patent

active

D03658333

REFERENCES:
patent: D330211 (1992-10-01), Degnan
patent: D330382 (1992-10-01), Degnan
patent: 2169874 (1939-08-01), Hardt
patent: 4116529 (1978-09-01), Yamaguchi
patent: 4269474 (1981-05-01), Kamimura
patent: 4726670 (1988-02-01), Sherrard
patent: 4892399 (1990-01-01), Ahn
patent: 4964711 (1990-10-01), Degnan
patent: 5138487 (1992-08-01), Ahn
patent: 5221992 (1993-06-01), Park

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