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:
Aug. 19, 1986
Filed:
Mar. 05, 1984
Applicant:
Inventors:
Pierre Ravinet, Bourg La Reine, FR;
Christian Claudepierre, Athis-Mons, FR;
Denis Guillou, Colombes, FR;
Francois Micheron, Gif Sur Yvette, FR;
Assignee:
Thomson-CSF, Paris, FR;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04R / ;
U.S. Cl.
CPC ...
1791 / ;
Abstract
A telephone transducer having a body and a spacer for securing a piezoelectric diaphragm and a printed circuit, wherein the body and the spacer are made with electrically conducting material to carry out the connections between the diaphragm and the printed circuit. The diaphragm can be made of polyvinylidene fluoride or polyvinylidene fluoride copolymer.