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:
Feb. 03, 2009
Filed:
Mar. 04, 2005
Rene Martinez, Seattle, WA (US);
Harley Heinrich, Everett, WA (US);
Vijay Pillai, Shoreline, WA (US);
Shashi Ramamurthy, White Plains, NY (US);
Rene Martinez, Seattle, WA (US);
Harley Heinrich, Everett, WA (US);
Vijay Pillai, Shoreline, WA (US);
Shashi Ramamurthy, White Plains, NY (US);
Intermec IP Corp., Woodland Hills, CA (US);
Abstract
An identification protocol that includes multiple identification methodologies is used to isolate and identify a radio frequency (RF) transponder. In accordance with a preferred embodiment of the present invention, the RF transponder includes a memory device, an RF front end, a random number generator (RNG), a counter, and a signal processing circuit connected thereto and programmed to operate in accordance with an identification protocol (or portions thereof). If multiple RF transponders are transmitting their ID numbers simultaneously, the radio frequency identification (RFID) base station may chose to resolve these conflicts later by transmitting the {a} Next_Cycle command, which moves the transponders back to a ready state. Alternatively, the {a} Fail command can be used to isolate and identify individual RF transponders. Once the transponder is isolated, it can be acknowledged and/or move to a 20 data_exchange state by transmitting a Read_New, FAK, PAK or AAK command, each one having unique characteristics.