Patents by Inventor Norichika Hamaguchi

Norichika Hamaguchi 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).

  • Sloping blocks and revetment structure using the same
    Patent number: 4813812
    Abstract: A stair-like revetment structure is formed by using sloping blocks. At the rear end of the block main body having an approximately rectangular and a rearwardly sloping flat step are provided rear engagement pods opening like a wedge at the rear of the main body and front engagement pods having an approximately same shape as the rear engagement pods extending adjacent a concave portion at the center bottom of the front of the main body, the concave portion being provided between the front and the rear engagement pods. This results in a low cost simplified sloping block structure.
    Type: Grant
    Filed: March 1, 1988
    Date of Patent: March 21, 1989
    Assignee: Nippon Tetrapod Co. Ltd.
    Inventors: Minoru Hasegawa, Norichika Hamaguchi