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:
Sep. 07, 1993
Filed:
Apr. 15, 1992
Applicant:
Inventor:
Norio Hama, Suwa, JP;
Assignee:
Seiko Epson Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01Q / ; H01Q / ; H01Q / ;
U.S. Cl.
CPC ...
343718 ; 343720 ; 343744 ; 343748 ; 343868 ;
Abstract
The antenna circuit and wrist radio instrument of the present invention compensates for slippage in the resonance frequency of antenna circuits caused by such as the wrist thickness of the person wearing them, and by being worn on the wrist and then not worn, and can always tune to a set frequency. Accordingly, the present invention is one that can automatically receive a set frequency signal stably and with a set sensitivity, with no need for special adjustments.