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. 10, 2005
Filed:
Aug. 01, 2002
Richard Fletcher, Cambridge, MA (US);
Richard Fletcher, Cambridge, MA (US);
Tagsense, Inc., Cambridge, MA (US);
Abstract
A radio frequency identification label is comprised of a tag circuitelectrically coupled to a defined marker regionsuch that the information generated by the tag circuit is dependent on the electronic properties of the marker region. The ID information conveyed to an external tag reader is thus a combination of fixed data intrinic to the tag circuitplus a portion of data that is dependent on the electronic properties of the marker region. The marker regioncan be comprised of various materials with complex structure, such as woven cloth or printed electrically conductive inks, such that the ID code transmitted by the label is thus more difficult to reproduce or to counterfeit. In addition, the marker regioncan also be arranged to have electrical coupling to the object onto which the label is affixed, thus creating an electronic ID code that is also dependent on the electronic properties of the tagged object itself.