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:
Jan. 14, 1997
Filed:
Feb. 23, 1995
Taketoshi Hino, Nagaokakyo, JP;
Abstract
A piezoelectric device which has a piezoelectric substrate and a plurality of piezoelectric resonators provided on the substrate. The piezoelectric resonators are an energy-confining type, and when a voltage is impressed on the piezoelectric resonators, each of the piezoelectric resonators generates a primary vibration in a direction of the thickness of the substrate and a secondary vibration in a direction on the surface of the substrate. The secondary vibration, in the form of an oscillatory wave, is propagated on the surface of the substrate and is attenuated gradually. At least two of the piezoelectric resonators have propagation paths of secondary vibrations which are substantially parallel to each other so as not to intersect within the substrate.