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. 15, 2003
Filed:
Dec. 12, 2001
Mitsuo Ebisawa, Kyoto, JP;
Takeshi Nagai, Nara, JP;
Narutoshi Kanazawa, Sakai, JP;
Masahiko Ito, Kashihara, JP;
Yuko Fujii, Yamatokoriyama, JP;
Tooru Sugimori, Yamatokoriyama, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A polarization apparatus is provided wherein a piezoelectric body tube is wound around a first rotation drum and a second rotation drum and a coaxial flexible piezoelectric body is polarized while the piezoelectric body tube is wound. According to the polarization apparatus, polarization can be conducted except for the coaxial flexible piezoelectric body of the portion containing a defect and a defect existing in the piezoelectric body tube of a given length can also be detected before an outer electrode is formed.