Patents by Inventor Atsushi Yagita

Atsushi Yagita 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).

  • Golf club shaft
    Patent number: 6213888
    Abstract: A golf club shaft includes a first strain gauge attached to a first side of the shaft facing the striking direction, a second strain gauge attached to a second side of the shaft facing the address direction at right-angles to the striking direction, and a third strain gauge which is capable of measuring the twist of the shaft. Detection signals from the strain gauges are used to classify a shaft into four types according to the swing type of a golfer in accordance with at least torque or kick point.
    Type: Grant
    Filed: February 18, 1999
    Date of Patent: April 10, 2001
    Assignee: Nippon Shaft Co., Ltd.
    Inventors: Masatake Kawaguchi, Makoto Watari, Katsumi Shimohira, Atsushi Yagita