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. 07, 2006
Filed:
Oct. 02, 2002
Michael A. Hughes, Pasco, WA (US);
Richard M. Pratt, Richland, WA (US);
Michael A. Hughes, Pasco, WA (US);
Richard M. Pratt, Richland, WA (US);
Battelle Memorial Institute, Richland, WA (US);
Abstract
An RFID system comprises an RFID reader configured to issue an RF command requesting that RF tags identify themselves, and to issue timing information defining a plurality of timeslots; and a plurality of RF tags in selective communication with the reader, the RF tags having respective IDs, respective tags being configured to randomly select a timeslot in which to reply to the RF command, and to issue an RF reply in response to the RF command in the randomly selected timeslot, the RF reply including a frequency pattern to assist in identifying the tag but not the tag's entire ID, different tags having different frequency patterns.