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:
Aug. 22, 1995
Filed:
Feb. 24, 1994
Applicant:
Inventor:
Ryuhei Yoshida, Nagaokakyo, JP;
Assignee:
Murata Manufacturing Co., Ltd., Kyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
310359 ; 310320 ;
Abstract
A piezoelectric-resonance device comprising a piezoelectric ceramic body, a pair of excitation electrodes provided so as to be opposed to each other with the piezoelectric ceramic body interposed therebetween, and connecting conductive portions connecting the excitation electrodes and side edges of the piezoelectric ceramic material, a portion, which is interposed between the excitation electrodes, of the piezoelectric ceramic body being polarized in the opposite direction to the direction of polarization of the other portion thereof.