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:
Oct. 27, 1992
Filed:
Jul. 18, 1990
Yasuhiro Tanaka, Kyoto, JP;
Abstract
There is disclosed a ladder type band-pass filter comprising plural vibrator blocks. Each vibrator block comprises a plate-shaped vibrator arranged in an electrically insulating frame. First and second metallic plates are fixed in the frame, and then, support the vibrator for vibration in the frame by arranging the vibrator between the first and second metallic plates. A pair of leading electrodes are formed on the frame so that a pair of leading electrodes are electrically connected to the first and second metallic plates, respectively, when the first and second metallic plates are fixed in the frame. Plural vibrator blocks are bonded in the axis direction of the frames, and the first and second leading electrodes of plural vibrator blocks are electrically connected so as to produce a ladder type band-pass filter.