Patents by Inventor Fumio Nakada

Fumio Nakada 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).

  • Threaded fastener
    Patent number: 4637767
    Abstract: A thread fastener for fastening resilient material workpieces with small torque to obtain a strong fastening force, wherein the fastener is provided with equivalent height continuous thread convolutions on a shank and a plurality of spaced thread-type projections are petaliferously formed and on the equivalent height thread convolutions which are arranged at an appropriate lead angle.
    Type: Grant
    Filed: December 28, 1984
    Date of Patent: January 20, 1987
    Assignee: Topura Co., Ltd.
    Inventors: Kouichi Yaotani, Fumio Nakada, Takao Tanaka, Minoru Yoshida