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:
May. 29, 1979
Filed:
Nov. 15, 1976
Applicant:
Inventors:
John F Sear, Northampton, GB;
Geoffrey M Garner, Northampton, GB;
Assignee:
Plessey Handel und Investments AG, Zug, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04R / ; H04R / ; H04R / ; B06B / ;
U.S. Cl.
CPC ...
1791 / ; 1791 / ; 310322 ; 310332 ; 310800 ;
Abstract
A piezoelectric transducer including a member composed of at least two superposed plastics layers at least one of which is piezoelectric, the said at least one piezoelectric layer being sandwiched in an untensioned state between two electrically conducting electrodes; and support means for the said member which are adapted to form at least one transducer element from the said member.