Patents by Inventor Takayuki Hiranuma

Takayuki Hiranuma 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).

  • Patent number: 6547262
    Abstract: The present invention relates generally to an improved skateboard truck for skateboards. The preferred skateboard truck comprises a yoke mounted by a king bolt to a mounting base. The mounting base comprises a socket hub and a bracket. The yoke comprises a hanger and a pivot arm. The pivot arm rotates freely in a bearing unit supporting the pivot arm in the socket hub. The king bolt clamps the hanger with a first grommet and a second grommet. The first grommet is flexible, preferably made of urethane rubber, and comprises an edge circumference and a center circumference. The center circumference is narrower than the edge circumference. Preferably, the first and second grommets are fluorescent.
    Type: Grant
    Filed: July 31, 2000
    Date of Patent: April 15, 2003
    Assignee: Unicomm Corporation
    Inventors: Toshihiro Yamada, Takayuki Hiranuma