Patents Assigned to Larson Manufacturing of South Dakota, Inc.
  • 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