Window sash

Details Window sash Window sash

1990-03-02

1993-04-06

Douglas, Alan P.

Furnishings

Window covering

D 6576

Patent

active

D03345017

REFERENCES:
patent: 2317686 (1943-04-01), Kuyper
patent: 2545906 (1951-03-01), Watkins
patent: 2787322 (1957-04-01), Jacobson et al.
patent: 2838109 (1958-06-01), Persson
patent: 2854102 (1958-09-01), Peeples
patent: 4647488 (1987-03-01), Schnebly
patent: 4768576 (1988-09-01), Anderson

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