Patents by Inventor Mark O. Culverson

Mark O. Culverson 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).

  • Tandem window assembly system
    Patent number: 7146769
    Abstract: A unitary frame carries a primary window and a secondary window. The view area of the primary window is substantially the same as the view area of the secondary window. Two windows can be installed, to close an opening, at the same time using the frame. A frame, a secondary window and a casing can be installed as a unitary structure over an existing primary window.
    Type: Grant
    Filed: June 12, 2003
    Date of Patent: December 12, 2006
    Assignee: Larson Manufacturing of South Dakota, Inc.
    Inventor: Mark O. Culverson