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:
Jul. 16, 1991
Filed:
Apr. 11, 1989
Applicant:
Inventors:
Takeshi Okamoto, Tokyo, JP;
Shoichi Minagawa, Tokyo, JP;
Assignee:
Clarion Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03D / ;
U.S. Cl.
CPC ...
375 90 ; 329300 ; 333196 ; 364821 ; 375 96 ;
Abstract
A surface-acoustic-wave device includes at least two surface-acoustic-wave transducers made from metal and disposed along a surface acoustic wave propagating direction on a piezoelectric substrate. At least one of the transducers has a different bandwidth, and a convolver output gate electrode in the form a rectangular metal layer is provided between the transducer having the different bandwidth and another transducer.