Patents by Inventor Seiji Hatsutori

Seiji Hatsutori 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).

  • Tapered screw member having guide means
    Patent number: 4818167
    Abstract: A tapered screw member provided with a tapered external thread or a tapered internal thread, which comprises disposing a guide means somewhat higher than the crest of another tapered thread at a position connecting to the crest of the tapered external thread or the tapered internal thread, thereby engaging tapered threads smoothly, easily and quickly.
    Type: Grant
    Filed: December 22, 1986
    Date of Patent: April 4, 1989
    Assignee: Daidotokushuko Kabushiki Kaisha
    Inventor: Seiji Hatsutori