Patents by Inventor Kunihisa Shigenobu

Kunihisa Shigenobu 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).

  • Vibration damping soundproof sheets for use in vehicles
    Patent number: 4734323
    Abstract: This invention is directed to a vibration damping soundproof sheet for use in vehicles, in which the surface of the soundproof layer is made flat irrespective of the or uneven configuration at the surface of a vehicle. The soundproof layer-forming material comprises a formed rubber blend in which a foaming agent and other rubber blending agents are blended with a rubber type polymer in which the soundproof layer-forming material contains from 15 to 85% by weight of 1,2-polybutadiene ingredient.
    Type: Grant
    Filed: April 9, 1987
    Date of Patent: March 29, 1988
    Assignee: Toyoda Gosei Co., Ltd.
    Inventors: Junichi Sato, Tomoyoshi Yamada, Junichiro Naito, Kunihisa Shigenobu, Kouichi Sato