Patents by Inventor Shiyoji Wada

Shiyoji Wada 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).

  • Print hammer in dot printer
    Patent number: 4304495
    Abstract: A print hammer in a dot printer is formed with a contactor secured to the free end portion of a leaf spring or to a contactor base provided on the free end portion of the leaf spring. The contactor is made of a wear-resistive alloy selected from the group consisting of platinum group metal alloys, alloys of platinum group metal and transition metal, and alloys of platinum group metal, transition metal and boron.
    Type: Grant
    Filed: June 1, 1979
    Date of Patent: December 8, 1981
    Assignee: Pilot Man-Nen-Hitsu Kabushiki Kaisha
    Inventors: Shiyoji Wada, Yoshihiko Sano
  • Dot printing wire
    Patent number: 4155660
    Abstract: A dot printing wire is provided at its tip with a wear-resistant contact made of an alloy selected from the group consisting of alloys composed of two or more platinum group metals, alloys of platinum group metals and transition metals and alloys of platinum group metals, transition metals and boron.
    Type: Grant
    Filed: March 10, 1977
    Date of Patent: May 22, 1979
    Assignee: Pilot Man-Nen-Hitsu Kabushiki Kaisha
    Inventors: Ichiro Takahashi, Eiji Sekine, Shiyoji Wada, Hiroshi Matubara