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:
Aug. 27, 1985
Filed:
Sep. 17, 1982
Applicant:
Inventor:
Dennis E Morris, Saratoga, CA (US);
Assignee:
National Semiconductor Corporation, Santa Clara, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
G09G / ; G09G / ;
U.S. Cl.
CPC ...
340814 ; 340802 ; 340711 ; 3403 / ; 340782 ;
Abstract
A circuit that monitors the LED driver output pins on an integrated circuit for quiescent moments and then uses those output pins, only during these moments, to strobe keys on a keyboard for input signals.