Door knocker with invisible lenticular breast plate

Details Door knocker with invisible lenticular breast plate Door knocker with invisible lenticular breast plate

1994-04-04

1995-06-27

Cuomo, Peter M.

Movable or removable closures

Mounted for optional movements

One closure movable separately from or with other closure

359511, 359618, 359894, D 8401, E06B 728

Patent

active

054268915

ABSTRACT:
A combined door knocker and viewer utilizes the from portion of the central breast plate area of the body of a door knocker as the forwardmost element of a lens system, permitting the viewer wide angle viewing of the area forward of the door undetected by the caller, who has no reason to suspect that the breast plate of the knocker coat-of-arms is also the front lens of a viewer.

REFERENCES:
patent: D159455 (1950-07-01), Waltman
patent: D221130 (1971-07-01), Gewertz
patent: D256093 (1980-07-01), Kuppermann et al.
patent: 2581234 (1952-01-01), Bloom
patent: 4415235 (1983-11-01), Coates
patent: 4719720 (1988-01-01), Olsen
patent: 4763444 (1988-08-01), Ritchie

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