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:
Jan. 11, 2005
Filed:
Jun. 17, 2003
Shinichiro Fukushima, Yokohama, JP;
Yutaka Takami, Yokohama, JP;
Atsushi Yoshioka, Ebina, JP;
Isao Nakagawa, Yokohama, JP;
Shuzo Matsumoto, Fujisawa, JP;
Kiyoharu Kishimoto, Yokohama, JP;
Shinichiro Fukushima, Yokohama, JP;
Yutaka Takami, Yokohama, JP;
Atsushi Yoshioka, Ebina, JP;
Isao Nakagawa, Yokohama, JP;
Shuzo Matsumoto, Fujisawa, JP;
Kiyoharu Kishimoto, Yokohama, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Maxell, Ltd., Osaka, JP;
Abstract
When an IC card module is used for a small portable information apparatus such as a portable telephone terminal, the module has a size much smaller than an ordinary IC card from the viewpoint that the apparatus is required to be small in size and weight. In the case of a small non-contact type card, there are problems that an antenna coil cannot secure its necessary surface area, a necessary power cannot be obtained for a signal to be transmitted or received, a communication distance from an external device becomes small. When the signal is transmitted and received via a booster coil provided between the external device and the antenna coil of the IC card module, the effective surface area of the antenna coil can be increased and the communication distance can be increased to a level as large as it can practically avoid involvement of any problem.