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. 18, 2004
Filed:
Apr. 16, 2002
Applicant:
Inventors:
Hiroki Watanabe, Ishikawa-ken, JP;
Yuichi Takamine, Kanazawa, JP;
Assignee:
Murata Manufacturing Co., LTD, Kyoto, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03H 9/64 ;
U.S. Cl.
CPC ...
H03H 9/64 ;
Abstract
A surface acoustic wave apparatus includes a plurality of interdigital transducers arranged in a longitudinally-coupled-resonator manner. The interdigital transducers are located adjacent to each other, and the pitch of an electrode finger located in an end portion of an IDT is made smaller than that of electrode fingers at the other portions in the interdigital transducers, and the duty of the electrode finger of which the pitch has been made smaller is smaller than that of the electrode fingers at the other portions.