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:
Apr. 19, 2005
Filed:
Oct. 19, 1999
Applicant:
Takaaki Asada, Moriyama, JP;
Inventor:
Takaaki Asada, Moriyama, JP;
Assignee:
Murata Manufacturing Co., LTD, Kyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04R017/00 ; G01R029/22 ;
U.S. Cl.
CPC ...
Abstract
A method for quickly screening piezoelectric transformer apparatuses having low mechanical strength and latent defects is performed by connecting a load impedance to a generator of a piezoelectric transformer apparatus and applying a stress signal to an actuator to vibrate the piezoelectric transformer apparatus. Latent-defect transformer apparatuses having low mechanical strength are damaged during this process and therefore can be easily identified.