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:
Jul. 24, 2012
Filed:
Jun. 22, 2007
David Ross Missimer, Raleigh, NC (US);
Thomas J. Frederick, Chapel Hill, NC (US);
George D. Cruickshanks, Raleigh, NC (US);
Steven C. Lin, Chapel Hill, NC (US);
David Ross Missimer, Raleigh, NC (US);
Thomas J. Frederick, Chapel Hill, NC (US);
George D. Cruickshanks, Raleigh, NC (US);
Steven C. Lin, Chapel Hill, NC (US);
Sirit Inc., Toronto, Ontario, CA;
Abstract
The present disclosure is directed to a system and method for interrogating radio frequency tags. In some implementations, a method includes A method includes successively polling, for a specified number of inventory cycles, a plurality of Radio Frequency Identification (RFID) tags in a first state. At least a first subset of the plurality of RFID tags transitions from the first state to a second state in response to the poll. After the specified number of inventory cycles, a command is transmitted to update at least a second subset of the plurality of RFID tags from the second state to first state. The plurality of RFID tags are subsequently polled after transmitting the update command.