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:
Dec. 07, 2010
Filed:
Aug. 12, 2008
Guenter Karjoth, Waedenswil, CH;
Luke O'connor, Adliswil, CH;
Michael Backes, Rentrisch, DE;
International Business Machines Corporation, Armonk, NY (US);
Abstract
For detecting a blocker RFID tag, the following steps are conducted. First, a random identifier of a given bit length is created. Alternatively, an identifier is selected out of a probing set, which is stored on a data storage device. The probing set comprises of identifiers, which are not being used as identifiers for a given set of RFID tags. In a second step, a response from all RFID tags is requested having an identifier matching the random identifier or, respectively, the selected identifier. In a third step, it is determined, depending on receiving or not receiving a response, whether the blocker RFID tag is present.