Patents by Inventor Yoichi Misawa

Yoichi Misawa 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).

  • Musical instrument incorporating a Helmholtz resonator
    Patent number: 5248846
    Abstract: Keyboard instruments incorporating sound systems for generating musical tones are disclosed. In a first keyboard instrument, speakers are mounted near a keyboard, and are arranged upright to be directed to the keyboard on the front side, thereby allowing a performer to clearly grasp the sound quality of performance tones. In a second keyboard instrument, which comprises a Helmholtz resonator consisting of a resonance port and a cabinet, an electro-acoustic transducer mounted on the outer surface of the cabinet and a driver for driving the transducer so as to cancel an air counteraction from the resonator, the size of a sound system is reduced, and the frequency characteristics, especially the low-frequency reproduction characteristics of the sound system are improved.
    Type: Grant
    Filed: July 6, 1992
    Date of Patent: September 28, 1993
    Assignee: Yamaha Corporation
    Inventors: Tatsuhiro Koike, Yoichi Misawa, Toshiyuki Suzuki
  • Keyboard instrument
    Patent number: 5086686
    Abstract: Keyboard instruments incorporating sound systems for generating musical tones are disclosed. In a first keyboard instrument, speakers are mounted near a keyboard, and are arranged upright to be directed to the keyboard on the front side, thereby allowing a performer to clearly grasp the sound quality of performance tones. In a second keyboard instrument, which comprises a Helmholtz resonator consisting of a resonance port and a cabinet, an electro-acoustic transducer mounted on the outer surface of the cabinet and a driver for driving the transducer so as to cancel an air counteraction from the resonator, the size of a sound system is reduced, and the frequency characteristics, especially the low-frequency reproduction characteristics of the sound system are improved.
    Type: Grant
    Filed: December 27, 1990
    Date of Patent: February 11, 1992
    Assignee: Yamaha Corporation
    Inventors: Yoichi Misawa, Toshiyuki Suzuki
  • Keyboard instrument
    Patent number: 5031500
    Abstract: Keyboard instruments incorporating sound systems for generating musical tones are disclosed. In a first keyboard instrument, speakers are mounted near a keyboard, and are arranged upright to be directed to the keyboard on the front side, thereby allowing a performer to clearly grasp the sound quality of performance tones. In a second keyboard instrument, which comprises a Helmholtz resonator consisting of a resonance port and a cabinet, an electro-acoustic transducer mounted on the outer surface of the cabinet and a driver for driving the transducer so as to cancel an air counteraction from the resonator, the size of a sound system is reduced, and the frequency characteristics, especially the low-frequency reproduction characteristics of the sound system are improved.
    Type: Grant
    Filed: June 15, 1989
    Date of Patent: July 16, 1991
    Assignee: Yamaha Corporation
    Inventors: Tatsuhiro Koike, Yoichi Misawa, Toshiyuki Suzuki