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:
May. 22, 2007
Filed:
Sep. 16, 2004
Applicants:
Lihu M. Chiu, Arcadia, CA (US);
Theodore A. Chapman, San Juan Capistrano, CA (US);
Inventors:
Lihu M. Chiu, Arcadia, CA (US);
Theodore A. Chapman, San Juan Capistrano, CA (US);
Assignee:
Printronix, Inc., Irvine, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
G08B 13/14 (2006.01);
U.S. Cl.
CPC ...
Abstract
An RFID verifier includes a transmit signal strength indicator (TSSI) and a receive signal strength indicator (RSSI). Using the TSSI, the RFID verifier may determine the amount of power an interrogated RFID tag is illuminated with. Similarly, using the RSSI, the RFID verifier may determine the amount of power returned to the RFID verifier by the RFID tag. By comparing the returned power to the amount used to illuminate the interrogated tag, the RFID verifier may provide an indicia of quality for the interrogated RFID tag.