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:
Dec. 29, 1981
Filed:
Sep. 24, 1980
Applicant:
Inventors:
Yasushi Miyoshi, Bisai, JP;
Yasuhiro Ishii, Gifu, JP;
Assignee:
Sanyo Electric Co., Ltd., Moriguchi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D21J / ;
U.S. Cl.
CPC ...
162218 ; 162135 ; 162136 ; 162137 ; 1621 / ; 162166 ; 162177 ; 162201 ; 162221 ; 162223 ; 162224 ; 162231 ; 427304 ; 427305 ; 427306 ; 427404 ; 4274071 ;
Abstract
A diaphragm for a speaker obtained by forming a diaphragm base by screen processing a mixture of carbon fiber, pulp and polyvinyl alcohol fiber as a binder in a manner similar to that employed for making paper, depositing a thermosetting resin on the diaphragm base by impregnation or coating, and subjecting the diaphragm base, on which the thermosetting resin has been deposited, to electroless plating to deposit a metal film in the interstices between fibers and on the entire fiber surface.
Miyoshi, Yasushi. (1981). Diaphragm for speaker and method of producing same (U.S. Patent No. 4308094). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4308094
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile