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.:

US 7009518 B1

PDF
Full Text
Expired
Date of Patent:
Mar. 07, 2006

Filed:

Apr. 27, 2004
Applicants:

Tung-tsai Liao, Hsinchu, TW;

Hsin-chou Lee, Hsinchu, TW;

Wu-shin Chen, Hsinchu, TW;

Inventors:

Tung-Tsai Liao, Hsinchu, TW;

Hsin-Chou Lee, Hsinchu, TW;

Wu-Shin Chen, Hsinchu, TW;

Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G08B 13/14 (2006.01);
U.S. Cl.
CPC ...
Abstract

A radio frequency identification (RFID) communication system and the search method thereof are disclosed, which apply search instructions and reads instructions to communicate between a read and a plurality of transponders. Each transponder generates a random number for comparison with received search instructions. When the random number meets with the number of received search instructions, a response request is sent by a corresponding transponder such that the reader can read the content of the corresponding transponder.


Find Patent Forward Citations

Liao, Tung-Tsai. (2006). Rfid communication system and the search method thereof (U.S. Patent No. 7009518). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7009518

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