Patents by Inventor Hironao Yamamuro

Hironao Yamamuro 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).

  • Method of manufacturing connector bolt
    Patent number: 5810670
    Abstract: A method of manufacturing a connector bolt includes the steps of forming axial grooves on a part of the shank of the connector bolt, and then simultaneously performing a rolling process for thread formation around the shank part with the axial grooves formed thereon with a rolling tool and a different rolling process around a part of the shank without the axial grooves with a different rolling tool.
    Type: Grant
    Filed: February 5, 1997
    Date of Patent: September 22, 1998
    Assignees: Tsuda Kogyo Kabushiki Kaisha, Kabushiki Kaisha Sanmei Seisakusho
    Inventors: Hironao Yamamuro, Naoshige Taniguchi