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. 28, 2006
Filed:
Mar. 29, 2004
Applicant:
Shinichiro Watanabe, Tokyo-to, JP;
Inventor:
Shinichiro Watanabe, Tokyo-to, JP;
Assignee:
Seiko Epson Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G08B 13/14 (2006.01);
U.S. Cl.
CPC ...
Abstract
An electronic circuit for a contactless tag includes a rectification circuit that rectifies an induced electromotive force caused by bringing an antenna coil into close proximity to a reader/writer to generate a rectified voltage and a secondary battery. A charging/discharging circuit is provided that charges according to the rectified voltage and discharges the secondary battery.