Torsion spring powered door

United States of America Patent

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Feb 14, 1989
Grant Date
N/A
app pub date
Jan 28, 1987
filing date
Jan 28, 1987

priority date (Note)
Expired

status (Latency Note)

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Abstract

An access door has a frame formed with longitudinally extending channels which receive a closure element for sliding therealong. A torsion spring secured to the frame and to the closure element maintains the closure element in an open or closed position.

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Patent Owner(s)

Patent Owner	Address
AT&T TELETYPE CORPORATION A CORP OF DE	5555 TOUHY AVENUE SKOKIE IL 60077

International Classification(s)

A47B:TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS....

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[Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Bischof, Albert	Norwood Park Township, IL	2	28
Rumps, Jr Norbert A	Arlington Heights, IL	2	31

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Torsion spring powered door

Number of patents in Portfolio can not be more than 2000

United States of America Patent

07007846

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PATENT NO	4804238
SERIAL NO	07007846
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07007846

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