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:
Jul. 04, 2006
Filed:
Jul. 08, 2004
Futoshi Deguchi, Fukuoka, JP;
Hiroshi Yoshinaga, Kasuya-gun, JP;
Masahiko Tanaka, Fukuoka, JP;
Hiroaki Haruyama, Fukuoka, JP;
Futoshi Deguchi, Fukuoka, JP;
Hiroshi Yoshinaga, Kasuya-gun, JP;
Masahiko Tanaka, Fukuoka, JP;
Hiroaki Haruyama, Fukuoka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
To provide a loop antenna capable of attenuating the distant electric field with the attenuation of the magnetic flux in the vicinity of an electromagnetic wave restrained, and a contactless IC card read/write apparatus. A loop antennahas an electromagnetic wave shieldover at least one side of the loop antenna, the electromagnetic wave shieldcomprising a plurality of electric conductorsa ground contactfor grounding the plurality of electric conductors and a lead wirefor connecting the plurality of electric conductorsto the ground contactThe plurality of electric conductorsare electrically connected via the lead wireto the ground contactand the plurality of electric conductorsare arranged so that the paths of the respective electric conductorsfrom any of their given points to the ground contactvia the lead wireare determined uniformly.