Patents by Inventor Tokisuke Wada

Tokisuke Wada 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).

  • Loudspeaker diaphragm and process for producing same
    Patent number: 4377617
    Abstract: A dome-shaped diaphragm for loudspeakers comprising a substrate fabric of synthetic fiber, a poly-urethane elastomer film for giving airtightness to the substrate fabric, and a viscoelastic resin adhesive adhering the fabric and the film together.
    Type: Grant
    Filed: December 2, 1981
    Date of Patent: March 22, 1983
    Assignee: Onkyo Kabushiki Kaisha
    Inventors: Akira Ikei, Motoharu Akahama, Tokisuke Wada, Takashi Onogi