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:
Oct. 18, 1977
Filed:
Dec. 17, 1974
Applicant:
Inventors:
Manfred Borner, Ulm (Danube), DT;
Gerhard Kohlbacher, Ulm (Danube), DT;
Assignee:
Licentia Patent-Verwaltungs-G.m.b.H, Frankfurt am Main, DT;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03H / ; H03H / ; H03H / ; H03H / ; 330 ;
U.S. Cl.
CPC ...
333 72 ; 310313 ; 330-55 ; 333 / ;
Abstract
An acoustic surface-wave filter comprises an element which is excitable to perform surface oscillations, which is formed at least partly of piezoelectric material and has interference locations for the surface wave on its surface together with electromechanical converter means, at least some of the interference locations forming a resonator with the average spacing of the interference locations being equal to a half of the wavelength of the surface waves or a whole number multiple of a half of the wavelength of the surface waves.