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:
May. 21, 2002
Filed:
Sep. 24, 1998
Applicant:
Inventors:
Donald K. Belcher, Rogersville, TN (US);
Ronald J. Hash, Rogersville, TN (US);
Robert W. Boyd, Eidson, TN (US);
Assignee:
Wherenet Corp., Santa Clara, CA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04L 2/730 ; A61F 2/06 ; H04Q 5/22 ; H04Q 1/100 ;
U.S. Cl.
CPC ...
H04L 2/730 ; A61F 2/06 ; H04Q 5/22 ; H04Q 1/100 ;
Abstract
A magnetic field-based tagged object information storage and retrieval system employs a spread spectrum modulated magnetic field for identifying each of a plurality of tagged objects to which spread spectrum modulation magnetic field transponders are attached. When interrogated by a tag reader, transponders embedded in plural tags generate spread spectrum modulated magnetic fields that are correlated with a reference spreading sequence in a tag reader signal processor to both detect and identify each responding tag.