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:
Mar. 29, 1988
Filed:
Oct. 31, 1986
Takehiro Takoshima, Furukawa, JP;
Alps Electric Co., Ltd., , JP;
Abstract
An elastic surface wave element which prevents mixture of foreign substances to improve the reliability thereof and allows a peripheral circuit for driving the element to be integrated with the element to facilitate designing and assembly of the element. The elastic surface wave element comprises an element body and a multi-layered printed circuit board disposed one on the other with a predetermined gap left therebetween and having terminal sections connected to each other. The element further comprises a sound wave absorbing member which seals outer peripheries along which the element body and the multi-layered printed circuit board are joined together and thus seals airtight a face of the element on which electrodes are formed.