Invention Grant
- Patent Title: Interrogating radio frequency tags
- Patent Title (中): 询问射频标签
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Application No.: US11767378Application Date: 2007-06-22
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Publication No.: US08228173B2Publication Date: 2012-07-24
- Inventor: David Ross Missimer , Thomas J. Frederick , George D. Cruickshanks , Steven C. Lin
- Applicant: David Ross Missimer , Thomas J. Frederick , George D. Cruickshanks , Steven C. Lin
- Applicant Address: CA Toronto, Ontario
- Assignee: Sirit Inc.
- Current Assignee: Sirit Inc.
- Current Assignee Address: CA Toronto, Ontario
- Agency: Fish & Richardson P.C.
- Main IPC: H04Q5/22
- IPC: H04Q5/22

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.
Public/Granted literature
- US20080150692A1 INTERROGATING RADIO FREQUENCY TAGS Public/Granted day:2008-06-26
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