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:
Jan. 31, 1984
Filed:
Jun. 24, 1981
Applicant:
Inventors:
Yasushi Miyoshi, Bisai, JP;
Yasuhiro Ishii, Gufu, JP;
Assignee:
Sanyo Electric Co. Ltd., Moriguchi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
428198 ; 428206 ; 428209 ; 428288 ; 428326 ; 428367 ; 428379 ; 428393 ; 428408 ; 428457 ; 428902 ;
Abstract
A diaphragm for a speaker formed of a mixture of carbon fiber, pulp and polyvinyl alcohol fiber as a binder with a thermosetting resin on the diaphragm base on which a metal film is provided in the interstices between fibers and on the entire fiber surface.
Miyoshi, Yasushi. (1984). Diaphragm for speaker (U.S. Patent No. 4428996). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4428996
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile