Patents by Inventor Yoshio Tsubonuma

Yoshio Tsubonuma 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).

  • Process and apparatus of constructing a water tight underground pile wall
    Patent number: 4537536
    Abstract: This invention relates to a process and an apparatus of constructing a water tight underground pile wall in the form of a row of piles in which previous piles are installed every other pile and thereafter subsequent piles are installed between said previously formed piles, both of said piles being connected together.
    Type: Grant
    Filed: October 18, 1983
    Date of Patent: August 27, 1985
    Assignee: The Shimizu Construction Co., Ltd.
    Inventors: Yoshio Tsubonuma, Tohru Kawai