Patents by Inventor Richard Michael Lowry

Richard Michael Lowry 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).

  • Marine backhoe dredge
    Patent number: 7143532
    Abstract: A marine backhoe dredge having a counterbalancing system that increases the hoisting capacity and hoisting speed of the backhoe. The device includes a backhoe mounted on a vessel and a counterbalancing system that includes an adjustable support structure, one or more cables operatively associated with the support structure and backhoe, and connected to a counterbalance such as a counterweight or a winch.
    Type: Grant
    Filed: January 15, 2004
    Date of Patent: December 5, 2006
    Assignee: Great Lakes Dredge & Dock Company
    Inventor: Richard Michael Lowry