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 7212121 B1

PDF
Full Text
Expired
Date of Patent:
May. 01, 2007

Filed:

Dec. 14, 2004
Applicants:

Shigeru Hashimoto, Inagi, JP;

Tadashi Haeno, Inagi, JP;

Inventors:

Shigeru Hashimoto, Inagi, JP;

Tadashi Haeno, Inagi, JP;

Assignees:

Fujitsu Limited, Kawasaki, JP;

Fujitsu Frontech Limited, Tokyo, JP;

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

A wireless tag system which does not require any anti-collision process or, if an anti-collision process is required, can reduce the number of tags that need to participate in the anti-collision process to make the anti-collision process proceeds fast. The wireless tag system comprises a plurality of wireless slave tags which have respective unique IDs, a plurality of wireless master tags arranged for the slave tags and storing the unique IDs of the slave tags and a wireless tag access control device which accesses the master tags to acquire the unique IDs of the slave tags from the master tags and subsequently accessing the slave tags by using the acquired unique IDs of the slave tags.


Find Patent Forward Citations

Hashimoto, Shigeru. (2007). Wireless tag system, wireless tag access control device, wireless tag access control method, wireless tag access control program and wireless tag (U.S. Patent No. 7212121). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7212121

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