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:
Apr. 03, 2007
Filed:
Aug. 28, 2003
Hiraku Akiho, Miyagi, JP;
Yutaka Okazaki, Tokyo, JP;
Akihiro Kikuchi, Chiba, JP;
Kazuo Goto, Kanagawa, JP;
Kazuhiko Urayama, Tokyo, JP;
Hiraku Akiho, Miyagi, JP;
Yutaka Okazaki, Tokyo, JP;
Akihiro Kikuchi, Chiba, JP;
Kazuo Goto, Kanagawa, JP;
Kazuhiko Urayama, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
An antenna device () is provided that is used in a recorder and/or writer destined for writing and reading data to and from a contactless IC card (). The antenna device () includes a loop coil () that radiates a magnetic field, magnetically couples with a loop coil () provided in the IC card (), and sends and receives data to and from the IC card (). The loop coil () is formed asymmetric for the winding sections thereof opposite to each other across the center of the loop coil () to be different in interval from each other.