Patents by Inventor Takeru Ohkubo

Takeru Ohkubo 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).

  • Process of molding racket frame formed of fiber reinforced thermoplastic resin free from burr and burn
    Patent number: 5766539
    Abstract: A process of molding a racket frame having an evacuation stage for shrinking a lamination of an inner bladder, a tubular prepreg and an outer protective tube before closing a mold, and the reinforcing fibers of the prepreg are not cut by inner edges of the mold, thereby preventing the racket frame from burr due to the reinforcing fibers cut by the inner edges.
    Type: Grant
    Filed: October 1, 1996
    Date of Patent: June 16, 1998
    Assignee: Yamaha Corporation
    Inventors: Takashi Fujita, Takeru Ohkubo