Patents by Inventor Araki Katsuhiro

Araki Katsuhiro 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: 7696424
    Abstract: A keyboard apparatus of an electronic musical instrument has a plurality of pivoting members (white key main body 1, black key main body 2, and massive body 28) which pivot in response to depression or release of keys, a frame 3 which supports the pivoting members, and action restricting members (lower limit stopper 5 and upper limit stopper 6) which cause collision thereof with the pivoting members to restrict a range in which the pivoting members are allowed to pivot. The action restricting member contains a plurality of grains 11 in an enclosure member 12, and is arranged, in a state where inflow and outflow of air are allowed between the closed area and outside air, at the frame's side.
    Type: Grant
    Filed: October 25, 2007
    Date of Patent: April 13, 2010
    Assignee: Yamaha Corporation
    Inventors: Ichiro Osuga, Araki Katsuhiro
  • Publication number: 20080098874
    Abstract: A keyboard apparatus of an electronic musical instrument has a plurality of pivoting members (white key main body 1, black key main body 2, and massive body 28) which pivot in response to depression or release of keys, a frame 3 which supports the pivoting members, and action restricting members (lower limit stopper 5 and upper limit stopper 6) which cause collision thereof with the pivoting members to restrict a range in which the pivoting members are allowed to pivot. The action restricting member contains a plurality of grains 11 in an enclosure member 12, and is arranged, in a state where inflow and outflow of air are allowed between the closed area and outside air, at the frame's side.
    Type: Application
    Filed: October 25, 2007
    Publication date: May 1, 2008
    Applicant: Yamaha Corporation
    Inventors: Ichiro Osuga, Araki Katsuhiro