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:
Jun. 14, 1983
Filed:
Mar. 18, 1981
Applicant:
Inventors:
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03H / ; H03H / ;
U.S. Cl.
CPC ...
333151 ; 3103 / ; 333194 ;
Abstract
A surface acoustic wave device includes a piezoelectric substrate having opposite flat surfaces. On one surface of the substrate, there are provided launching transducer for launching acoustic waves and receiving transducer for receiving the launched acoustic waves. On the other surface of the substrate, there are provided a plurality of grooves aligned in an angled relation with the direction of propagation of the acoustic waves. The grooves are divided into two or more groups in which the depth of the grooves in one group is different from that in any other group.