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. 22, 1983
Filed:
Dec. 04, 1980
Applicant:
Inventor:
Kenneth T Wolff, Medway, MA (US);
Assignee:
Data General Corporation, Westboro, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G09G / ;
U.S. Cl.
CPC ...
340707 ; 340744 ;
Abstract
Electronic apparatus and method for determining location of the sensing aperture of a light pen on the face of a raster scan monochrome CRT is disclosed. In a preferred embodiment, logic circuitry and cascaded counters are used to determine position information for the earliest horizontal detection of light during each frame. Apparatus is included for retaining the position information and making it available to the CRT processor for use in generating a cursor.