Patents by Inventor Akihiro Nakayama

Akihiro Nakayama 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: 5799643
    Abstract: A slurry managing system for a wire saw is disclosed. The wire saw includes a wire that has a plurality of wire lines extending in parallel to one another. The wire is supplied with slurry containing abrasive grains in dispersing liquid to cut a workpiece so as to simultaneously produce a multiplicity of wafers. A mixer device mixes the slurry prior to supplying of the slurry to the wire saw. A first supplying device supplies the grains to the mixer device. A second supplying device supplies the dispersing liquid to the mixer device. A first adjusting device adjusts the amount of the grains supplied to the mixer device from the first supplying device. A second adjusting device adjusts the amount of the liquid supplied to the mixer device from the second supplying device.
    Type: Grant
    Filed: October 1, 1996
    Date of Patent: September 1, 1998
    Inventors: Kensho Miyata, Kazutomo Kinutani, Noboru Katsumata, Kensho Kuroda, Toyotaka Wada, Akihiro Nakayama, Katsumasa Takahashi, Takaharu Nishida, Shouichi Uemura, Tetsuo Kodama
  • Patent number: 4907809
    Abstract: The present invention provides a game kit comprising a board and a plurality of pieces. The playing field of the board comprises a plurality of intersecting points created by three sets of parallel line segments meeting at an angle of 60.degree.. The points are especially marked to designate the locations on which the pieces are to be placed, with the object of forming equilateral triangles. Interspersed between each of the three sets of parallel line segments is an auxiliary set of parallel line segments. The auxiliary line segments create a second set of intersecting points on the board which may be used as an aid in identifying the location of potential triangles. The game pieces may be played selectively with their face or back directed upwards to designate the players and are provided with markings to identify said face and back. The equilateral triangles are formed by players strategically placing their pieces, in turn one piece at a time, on the unoccupied specially marked intersecting points.
    Type: Grant
    Filed: June 7, 1988
    Date of Patent: March 13, 1990
    Assignee: Takio Kurokawa
    Inventors: Akihiro Nakayama, Tomoko Tachiki