Patents by Inventor Junichi Hishida

Junichi Hishida 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).

  • Method of manufacturing sound-proof products
    Patent number: 6576172
    Abstract: A processed material in which a fibrous binder is mixed with chip-like solid matters such as soft urethane foam is quickly injected into a preform mold having a flat molding surface with a uniform filling density, and then fed to a main mold having a molding surface whose shape corresponds to that of a sound-proof product to be formed, so that main molding is performed under sufficient pressure and heat. With the main molding carried out after the preform molding, it is possible to manufacture sound-proof products of excellent quality.
    Type: Grant
    Filed: August 14, 2000
    Date of Patent: June 10, 2003
    Assignee: Toyoda Boshoku Corporation
    Inventors: Toshiyuki Ario, Takashi Naka, Junichi Hishida, Tetsuyasu Akita, Masaru Suzuki, Yasushi Tsujita, Takuji Kajihara