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:
Nov. 28, 2006
Filed:
Aug. 30, 2004
Takakazu Fukano, Nagano, JP;
Yasuhiko Kosugi, Nagano, JP;
Noboru Asauchi, Nagano, JP;
Eiichi Ishii, Tokyo, JP;
Takakazu Fukano, Nagano, JP;
Yasuhiko Kosugi, Nagano, JP;
Noboru Asauchi, Nagano, JP;
Eiichi Ishii, Tokyo, JP;
Seiko Epson Corporation, Tokyo, JP;
Yoshikawa RF Systems Co., Ltd., Tokyo, JP;
Abstract
A plurality of small loop antenna cellsandare magnetically coupled to an antenna coilof a non-contact type data carrierIn the plurality of small loop antenna cells, the directions of the magnetic moments of the signals transmitted to the non-contact type data carrierare opposite to each other, the sum of the magnetic moments generated from all the small loop antenna cellstois zero and a conductor forming a short ring patternis provided collectively for the plurality of small loop antenna cells. Thus, imbalance caused between the small loop antenna cellstocan be compensated for by the short ring pattern