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:
Jun. 30, 1981
Filed:
Aug. 02, 1979
Applicant:
Inventors:
Hideo Suyama, Yokohama, JP;
Masana Ugaji, Tokyo, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H04R / ;
U.S. Cl.
CPC ...
179180 ; 1791 / ; 181166 ;
Abstract
In an electro-acoustic transducer having a magnetic circuit and a vibrative member disposed in an air gap formed in the magnetic circuit, the vibrative member having a frame with an opening, a membrane mounted on the frame, an acoustic transparent member mounted on the frame so as to define a space between the membrane and the acoustic transparent member, and an acoustic damping material disposed in the space.