Patents by Inventor Hisao Negoro

Hisao Negoro 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).

  • Dust guard for a scroll chuck
    Patent number: 4553765
    Abstract: In a scroll chuck accommodating a scroll plate, a dust guard is fitted in a continuous groove formed by the scroll thread of the scroll plate. The dust guard consists of an elastic cord made of a material having rubber-like elasticity, and has such a length as to extend over the full length of the continuous groove. The outside surface of the elastic cord is substantially flush with the crest of the scroll thread.
    Type: Grant
    Filed: November 2, 1984
    Date of Patent: November 19, 1985
    Inventor: Hisao Negoro
  • Chuck
    Patent number: D272828
    Type: Grant
    Filed: May 22, 1981
    Date of Patent: February 28, 1984
    Inventor: Hisao Negoro