Motorized extension tool used to open and close clerestory windo

Details Motorized extension tool used to open and close clerestory windo Motorized extension tool used to open and close clerestory windo

1991-09-23

1993-07-13

Ansher, Bernard

Tools and hardware

Other tools and implements

With relative movement of parts while performing function

Patent

active

D03372510

REFERENCES:
patent: D297104 (1988-08-01), Svetlik
patent: D304543 (1989-11-01), Somers et al.
patent: D305093 (1989-12-01), Hoshino et al.
patent: 2637233 (1953-05-01), Hoffman
patent: 2796101 (1967-06-01), Hasemann et al.
patent: 2814322 (1957-11-01), Kupfrian
patent: 3696694 (1972-10-01), Boro
patent: 3802518 (1974-04-01), Albert

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