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. 28, 2006
Filed:
Oct. 02, 2002
Richard M. Pratt, Richland, WA (US);
Steven B. Thompson, Richland, WA (US);
Richard M. Pratt, Richland, WA (US);
Steven B. Thompson, Richland, WA (US);
Battelle Memorial Institute, Richland, WA (US);
Abstract
Wireless communications systems, radio frequency identification devices, wireless communications methods, and radio frequency identification device communications methods are described. In one aspect, a wireless communications system includes a reader configured to output a plurality of wireless signals including different modulation frequencies and to receive a plurality of second wireless signals, a plurality of communication devices configured to receive the first wireless signals and to output the second wireless signals using backscatter modulation and wherein the communication devices are individually configured to respond to one of the first wireless signals having a first modulation frequency at a first moment in time and to respond to one of the first wireless signals having a second modulation frequency different than the first modulation frequency at a second moment in time.