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:
Nov. 29, 1977
Filed:
May. 19, 1976
Applicant:
Inventors:
Harry Frank Tiersten, Schenectady, NY (US);
Robert Chastain Smythe, Orlando, FL (US);
Assignee:
Piezo Technology Inc., Orlando, FL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03H / ; H03H / ; H03H / ; H03H / ;
U.S. Cl.
CPC ...
333 72 ; 310313 ; 310366 ; 333 / ;
Abstract
A resonator and resonator type wave filter formed by a piezoelectric body on which acoustic surface waves are guided and reflected and in which mode coupling in a direction transverse to the surface wave propagation is utilized. The transverse modes are controlled so as to provide improved response characteristics by minimizing suppressing and/or otherwise controlling unwanted modes of vibration in the body.