Patents by Inventor Yasushi Miyoshi

Yasushi Miyoshi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Diaphragm for speaker
    Patent number: 4428996
    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.
    Type: Grant
    Filed: June 24, 1981
    Date of Patent: January 31, 1984
    Assignee: Sanyo Electric Co. Ltd.
    Inventors: Yasushi Miyoshi, Yasuhiro Ishii
  • Diaphragm for speaker and method of producing same
    Patent number: 4308094
    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.
    Type: Grant
    Filed: September 24, 1980
    Date of Patent: December 29, 1981
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Yasushi Miyoshi, Yasuhiro Ishii