Patents by Inventor Watanabe Yoshinori

Watanabe Yoshinori 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).

  • Rail type universal parallel ruler device
    Patent number: 4312132
    Abstract: A rail type universal parallel ruler device wherein a balance weight is provided which is connected to the head by means of a cord or the like and shifts along a vertical rail in a direction opposite to the shifting of the head. A fixed magnet is disposed along almost the entire length of the path of travel of the balance weight, and a magnet is provided on the balance weight opposed to the fixed magnet, and the balance weight is repulsed so as to be suspended as it moves along the path of travel by the magnetic force between the magnets.
    Type: Grant
    Filed: December 19, 1979
    Date of Patent: January 26, 1982
    Assignee: Mutoh Industry, Ltd.
    Inventors: Mutoh Hiroshi, Hikawa Masami, Watanabe Yoshinori, Yamazaki Kouichi