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. 05, 1991
Filed:
Nov. 29, 1988
Applicant:
Inventors:
Curtis N Kell, Flora, IN (US);
R Clark Griffin, Dayton, OH (US);
John M Dikeman, Kokomo, IN (US);
Mario D Nemirovsky, Goleta, CA (US);
Assignee:
Delco Electronics Corporation, Kokoma, IN (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B / ;
U.S. Cl.
CPC ...
340825310 ; 340825320 ; 340825340 ;
Abstract
A vehicle anti-theft device is disclosed which includes an electronically erasable programmable read only memory (EEPROM) which stores a modifiable code which must be matched by an input code in order to start the vehicle. The ignition key includes a resistor pellet, engaged by contact in the ignition lock assembly, which is measured to provide the input code. To avoid problems associated with intermittent contact engagement with the resistor pellet, circuitry is provided to control the resistor measurement cycle.