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. 24, 2001
Filed:
Sep. 10, 1999
Katsuyuki Honda, Shioiiri, JP;
Motomu Hayakawa, Shiojiri, JP;
Ichiro Aoshima, Shimosuwa-machi, JP;
Hidetoshi Matsuki, Sendai, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
In at least two separated devices, a data transmission or a power transmission is performed through the electromagnetic coupling of coils which are arranged in mutually facing positions in the respective devices. In order to reduce the effect of a displacement between two coils even if the two coils are displaced from each other, the inner diameter of a coil,on the side of a station, as a primary coil, for performing the data transmission or the power transmission, is set to be larger than the inner diameter of a coil,on a watch side, as a secondary coil, by at least 1 mm.