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:
Apr. 07, 1987
Filed:
Apr. 16, 1985
Yasuhiro Tanaka, Ishikawa, JP;
Murata Manufacturing Co., Ltd., Nagaokakyo, JP;
Abstract
A filter of the ladder type has an elongated hollow casing with an aperture at one axial end face and at least two grooves on the inner surface at at least two different positions around the inner periphery thereof and which extend parallel to the longitudinal axis of the body. An elongated terminal strip in the bottom of one of the grooves extends along substantially the entire length of the one groove and extends out of the casing. A plurality of piezoelectric devices and a plurality of terminal plates stacked in the casing in the direction of the longitudinal axis and in an order for forming a ladder type filter. Some of the terminal plates have terminal tips extending into the one groove in firm electrical contact with the terminal strip. The terminal tips on some of the remainder the terminal plates extend into another groove and the terminal tips some of these have longitudinally extending terminal portions extending along the groove and with which the terminal tips on some of the remainder of the terminal plates are in electric contact for forming the ladder type filter. Terminal tips on the two end terminal plates extend out of the casing.