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. 25, 2008
Filed:
Jun. 29, 2004
Futoshi Deguchi, Fukuoka, JP;
Hiroshi Yoshinaga, Kasuya-gun, JP;
Masahiko Tanaka, Fukuoka, JP;
Hiroaki Haruyama, Fukuoka, JP;
Takashi Yamaguchi, Fukuoka, JP;
Futoshi Deguchi, Fukuoka, JP;
Hiroshi Yoshinaga, Kasuya-gun, JP;
Masahiko Tanaka, Fukuoka, JP;
Hiroaki Haruyama, Fukuoka, JP;
Takashi Yamaguchi, Fukuoka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
The object of the invention is to provide a noncontact IC card reader/writer integrated with an antenna that does not require the limitation of an installation location and the adjustment of a resonance frequency of the antenna, is convenient in installation, is provided with a stable characteristic, is small-sized and low-priced. To achieve the object, the invention is provided with a loop antenna that supplies electric power and send data to a noncontact IC card by electromagnetic induction and acquires receive data from the noncontact IC card by load fluctuation, a magnetic body arranged closely at the back of the loop antenna, a first metallic plate arranged on the back side of the magnetic body and a second metallic plate arranged on the back side of the first metallic plate and larger than the first metallic plate in size.