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:
Dec. 25, 1984
Filed:
Jun. 29, 1981
Hiroshi Takeuchi, Matsudo, JP;
Shigeru Jyo mura, Hachioji, JP;
Kazuyuki Nagatsuma, Hachioji, JP;
Mitsutaka Hikita, Kokubunji, JP;
Yukio Ito, Kokubunji, JP;
Sakichi Ashida, Fuchu, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
The piezoelectric resonator of this invention consists of a piezoelectric ceramic plate which is polarized in the direction of thickness over the entire plate, two split electrodes are formed on one main surface of the piezoelectric ceramic plate, and an electrode is formed on the entire main surface opposed to the above main surface on which are formed the split electrodes. When an operating voltage is supplied to the above two split electrodes, the piezoelectric ceramic plate between the two split electrodes and the other electrode undergoes resonance in a thickness dilatational mode with a phase difference of 180.degree..
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile