Patents by Inventor Toda Hiroyuki

Toda Hiroyuki 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).

  • Filtering apparatus for an electronic musical instrument
    Patent number: 5631434
    Abstract: A filtering apparatus for an electronic musical instrument includes at least a digital filter. The digital filter has a frequency characteristic determined by a filtering parameter and performs a filtering operation on a musical tone signal inputted thereto. In addition, the filtering parameter is changed in accordance with a keycode signal representing a tone pitch of the musical tone signal. Thus, the frequency characteristic is varied in accordance with a keycode signal.
    Type: Grant
    Filed: April 11, 1995
    Date of Patent: May 20, 1997
    Assignee: Yamaha Corporation
    Inventor: Toda Hiroyuki
  • Filtering apparatus for an electronic musical instrument
    Patent number: RE38003
    Abstract: A filtering apparatus for an electronic musical instrument includes at least a digital filter. The digital filter has a frequency characteristic determined by a filtering parameter and performs a filtering operation on a musical tone signal inputted thereto. In addition, the filtering parameter is changed in accordance with a keycode signal representing a tone pitch of the musical tone signal. Thus, the frequency characteristic is varied in accordance with a keycode signal.
    Type: Grant
    Filed: May 20, 1999
    Date of Patent: February 25, 2003
    Assignee: Yamaha Corporation
    Inventor: Toda Hiroyuki