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. 12, 2002
Filed:
Feb. 18, 1999
Applicant:
Inventors:
Gary W. Schneider, Castle Rock, CO (US);
Drew J. Thwaites, Littleton, CO (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B 5/00 ; G08B 1/314 ; G08B 2/600 ;
U.S. Cl.
CPC ...
H04B 5/00 ; G08B 1/314 ; G08B 2/600 ;
Abstract
A method and system for communicating data between controller and a transponder where the processor is powered by current received from an antenna. The controller is magnetically coupled to the transponder to sense impedance variations in the transponder. The impedance of the transponder is altered by varying current used by a processor within the transponder. The processor current is controlled by varying the processor clock rate.