Patents by Inventor Darryl F. Walters

Darryl F. Walters 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).

  • Bridge or tunnel construction
    Patent number: 5351353
    Abstract: A bridge or tunnel construction consisting of one or more arch units (10), each unit formed from a pair of reinforced concrete arch segments (11 and 12) interconnected to form the crown of the arch unit with the arch unit or units being overlaid with a compacted interacting soil layer.
    Type: Grant
    Filed: March 31, 1992
    Date of Patent: October 4, 1994
    Assignee: CSR Humes Pty. Limited
    Inventor: Darryl F. Walters