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:
Mar. 31, 1998
Filed:
Jul. 22, 1996
Applicant:
Inventor:
I Nelson Wakefield, Cary, NC (US);
Assignee:
Ericsson, Inc., Research Triangle Park, NC (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01H / ;
U.S. Cl.
CPC ...
200 / ; 200512 ; 200313 ;
Abstract
A pair of electrical contacts are provided on a lower surface of each key in a keypad assembly. When a key is depressed, the contacts are brought into electrical communication with a common conductive surface such that an electrical circuit is completed between a discrete pair of terminals. The arrangement, number, and configuration of keys can be changed without modifying the decoding logic and supporting circuitry of a keypad-operated instrument.