Patents by Inventor Mutsumasa Sasaki

Mutsumasa Sasaki 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).

  • Plastic hub containing a magnetic material and method of its manufacture
    Patent number: 5448553
    Abstract: An optical memory disk hub made essentially of from 7 to 55% by weight of a thermoplastic resin and from 45 to 93% by weight of magnetic powder and/or magnetic fiber.
    Type: Grant
    Filed: December 19, 1991
    Date of Patent: September 5, 1995
    Assignee: Mitsubishi Rayon Company Limited
    Inventors: Naoyuki Suzuki, Mutsumasa Sasaki