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:
Nov. 09, 1993
Filed:
Apr. 09, 1992
Tatsuo Ogawa, Nagoya, JP;
Isao Shimizu, Yokosuka, JP;
Abstract
A ladder-type electric filter device in which a casing is partitioned into two compartments, one for containing strip-shaped series piezoelectric resonator elements which are operated at a longitudinal oscillation mode and the other for containing square shaped parallel piezoelectric resonator elements which are operated at a peripheral oscillation mode, each of the series and parallel resonator elements is layered along the height of the casing. Alternatively, an input, output and grounding terminal plates for electrically connecting rectangular piezoelectric resonator elements operated at a longitudinal oscillation mode are integrally formed with a casing for containing the rectangular piezoelectric resonator elements.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile