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. 07, 2013
Filed:
Feb. 04, 2011
Applicant:
Isao Sakama, Hiratsuka, JP;
Inventor:
Isao Sakama, Hiratsuka, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06K 19/06 (2006.01);
U.S. Cl.
CPC ...
Abstract
An RFID tag prevents reduction of communication characteristics due to mutual interference of RFID tags and enables to collectively read plural densely arranged RFID tags by a reader apparatus even when the plural RFID tags are in a densely arranged state. The RFID tag of the present invention is an RFID tag having an IC chip and a first antenna connected to the IC chip, provided with an impedance matching circuit for performing impedance matching between the IC chip and the first antenna, and arranged by stacking a conductor to cover the impedance matching circuit via an insulator base material.