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:
May. 01, 2001
Filed:
Aug. 27, 1999
Eiji Ozeki, Aichi, JP;
Tatsuo Ogawa, Gifu, JP;
NGK Spark Plug Co., Ltd., Aichi, JP;
Abstract
A piezoelectric filter which is adapted to reduce its height and to electrically and mechanically protect the resonators thereof, and is easy to manufacture and assemble, wherein a plurality of resonators S,through S,and P,through P,are surrounded by respective frame-like spacers,and laid one on the other with intermediary printed circuit boards,interposed therebetween, a top printed circuit board,are placed on the top, a bottom printed circuit board,provided on the lower surface thereof with a plurality of connection electrodes,are placed on the bottom, the frame-like spacers, the top printed circuit board and the bottom printed circuit board are bonded together along the peripheral edges thereof, and the electrodes of the resonators are electrically connected to respective connection electrodes by way of conduction patterns,through,through,formed on the respective printed circuit boards to produce an intended filter circuit.