Patents by Inventor Koji Takayama

Koji Takayama 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).

  • Speaker diaphragm
    Publication number: 20020046900
    Abstract: A speaker diaphragm that has a high heat-radiation efficiency. The speaker diaphragm includes a diaphragm main body made from a resin, and a metallic plate adhered to a major acoustic surface of the diaphragm main body adjacent a voice coil bobbin. The voice coil bobbin is attached to the diaphragm man body.
    Type: Application
    Filed: October 10, 2001
    Publication date: April 25, 2002
    Applicant: Pioneer Corporation and Tohoku Pioneer Corporation
    Inventors: Yasuhisa Abe, Takashi Suzuki, Koji Matsumoto, Koji Takayama