Patents by Inventor Hiroshi M. Ikenaga

Hiroshi M. Ikenaga 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).

  • Three-dimensional manipulative puzzle
    Patent number: 6592122
    Abstract: A three-dimensional manipulative puzzle including a sphere, a pattern of indicia provided on the surface of the sphere, a ring slidably provided on the sphere and a partial pattern of the pattern of indicia provided on a surface of the ring. The partial pattern provided on the surface of the ring is provided such that it only aligns with the pattern on the surface of the spherical member at only one position. Accordingly, the three-dimensional manipulative puzzle is solved by a user by aligning the partial pattern on the ring member with the pattern on the spherical member.
    Type: Grant
    Filed: October 4, 2001
    Date of Patent: July 15, 2003
    Inventor: Hiroshi M. Ikenaga
  • THREE-DIMENSIONAL MANIPULATIVE PUZZLE
    Publication number: 20030067113
    Abstract: A three-dimensional manipulative puzzle including a sphere, a pattern of indicia provided on the surface of the sphere, a ring slidably provided on the sphere and a partial pattern of the pattern of indicia provided on a surface of the ring. The partial pattern provided on the surface of the ring is provided such that it only aligns with the pattern on the surface of the spherical member at only one position. Accordingly, the three-dimensional manipulative puzzle is solved by a user by aligning the partial pattern on the ring member with the pattern on the spherical member.
    Type: Application
    Filed: October 4, 2001
    Publication date: April 10, 2003
    Inventor: Hiroshi M. Ikenaga