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:
Feb. 27, 2001
Filed:
Jun. 19, 1998
Yoshihiko Hayashi, Tokyo, JP;
Takashi Suga, Yokohama, JP;
Kouichi Uesaka, Yokohama, JP;
Ryouzou Yoshino, Hadano, JP;
Keisuke Igarashi, Hamura, JP;
Other;
Abstract
A reader and/or writer apparatus, a power feeding system and a power feeding and communication transmission and/or reception system in a proximate wireless card system arranged so that power which satisfies the requirement of the Radio Law (500 &mgr;V/m at a distance of 3 m from the reader and/or writer apparatus) regarding the radiated electric field is supplied sufficiently from the reader and/or writer apparatus to the proximate wireless card (IC card). The reader and/or writer apparatus has a spirally shaped or coil-shaped antenna for generating electromagnetic fields both to supply operational power to an IC card and to perform transmission and/or reception of signals for communication to and/or from the IC card and a conductor member for forming a mirror image of the antenna on its back side.