Patents by Inventor Retsuo Saito

Retsuo Saito 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).

  • Ball shooting machine for volleyball practice
    Patent number: 4323048
    Abstract: A ball shooting machine for volleyball practice has a pair of tire-wheel type ball shooting mechanisms supported by members comprising an intermediate rod, a pillar and legs. Mechanisms for varying the shooting angle, direction, height and course of the ball are provided at each joint of the supporting members respectively. Balls are charged in a member mounted at such a specific angle as to make it possible to charge the ball smoothly irrespective of the inclination or position of the ball shooting machine.
    Type: Grant
    Filed: August 26, 1980
    Date of Patent: April 6, 1982
    Assignee: Kabushiki Kaisha Tokiwa Seisakusho
    Inventors: Retsuo Saito, Junji Nagase
  • Serving machine for use in practicing volleyball
    Patent number: D260024
    Type: Grant
    Filed: May 30, 1979
    Date of Patent: July 28, 1981
    Assignee: Kabushiki Kaisha Tokiwa Seisakusho
    Inventors: Retsuo Saito, Junji Nagase