Collapsible projection screen

Details Collapsible projection screen Collapsible projection screen

1989-04-24

1992-01-21

Ansher, Bernard

Photography and optical equipment

Photographic accessory

Screen or element thereof

160 24

Patent

active

D03233383

REFERENCES:
patent: D219408 (1970-12-01), Frish
patent: D284875 (1986-07-01), Howard
patent: D300041 (1989-02-01), Kurozumi et al.
patent: D312008 (1990-11-01), Speed et al.
patent: 1835642 (1931-12-01), Friedland
patent: 2272269 (1942-02-01), Heck
patent: 2611427 (1952-09-01), Du Mais et al.
patent: 3592255 (1971-07-01), Potter et al.
patent: 3640601 (1972-02-01), Murray
patent: 3942869 (1976-03-01), Portner

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