Patents Assigned to Zenzaburo Kawanishi
  • Whistle
    Patent number: 4280299
    Abstract: A whistle including a mouthpiece adapted to be fit on a body. The body has three cavities different in depth. A protuberance provided in the chamber at the bottom of the mouthpiece is adapted to cover one of the cavities. Different pitches of the sound can be produced according to which cavity is covered.
    Type: Grant
    Filed: November 8, 1979
    Date of Patent: July 28, 1981
    Assignee: Zenzaburo Kawanishi
    Inventor: Toshio Oka