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:
Apr. 09, 1996
Filed:
Dec. 19, 1990
Applicant:
Inventors:
Stephen M Curry, Dallas, TX (US);
Michael L Bolan, Dallas, TX (US);
William L Payne, II, Garland, TX (US);
Kevin E Deierling, Dallas, TX (US);
Guenter H Lehmann, Dallas, TX (US);
Assignee:
Dallas Semiconductor Corporation, Dallas, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
395800 ; 3642295 ; 3642385 ; 3642865 ; 364D / ;
Abstract
A printer port adapter which permits electronic keys to be accessed through the printer port of the PC, without disrupting the normal operation of the printer port in any mode of operation whatsoever. The electronic keys used have a one-wire signal interface, and this interface can be inserted into the full standard ISA printer port pin assignment, as well as the all known nonstandard additional assignments which have been overlaid onto the standard printer port.