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. 12, 1999
Filed:
Nov. 07, 1996
Applicant:
Inventor:
Yutaka Tada, Osaka, JP;
Assignee:
Murata Manufacturing Co., Ltd., Kyoto, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03H / ;
U.S. Cl.
CPC ...
333195 ; 3103 / ;
Abstract
A surface acoustic wave filter has an input electrode and an output electrode of a finger type with mutually parallel elongated fingers formed generally at a constant pitch on a piezoelectric substrate and sandwiched between a pair of reflectors. Two of these fingers of the input electrode which are the closest and the second closest to the output electrode, or two of these fingers of the output electrode which are the closest and the second closest to the input electrode, are connected together to a same grounding terminal. A plurality of such filters may be connected together to form a multi-stage filter.