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:
Feb. 12, 1991
Filed:
Dec. 22, 1989
Applicant:
Inventors:
Teruo Niitsuma, Tokyo, JP;
Syuichi Mitsutsuka, Tokyo, JP;
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04R / ;
U.S. Cl.
CPC ...
367140 ; 3103 / ; 333154 ; 333151 ; 333194 ;
Abstract
A surface acoustic wave device according to the present invention can be molded surely with resin, leaving a free space over exciting portions and a propagating portion by disposing a recess portion formed over the exciting portions and the propagating portion on a piezoelectric substrate without using any metallic package.