The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 14, 1989
Filed:
Jan. 28, 1987
Applicant:
Inventors:
Albert Bischof, Norwood Park Township, IL (US);
Norbert A Rumps, Jr, Arlington Heights, IL (US);
Assignee:
American Telephone and Telegraph Company - AT&T Teletype, Skokie, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A47B / ;
U.S. Cl.
CPC ...
3121 / ; 312319 ; 220348 ;
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.