Patents by Inventor Geoffrey Hitzig

Geoffrey Hitzig 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).

  • Means for preventing air leakage through window sash interlock
    Patent number: 4802308
    Abstract: A means for preventing air leakage through the sealing means existing between a pair of relatively movable sash elements in the area where the sealing zone is normally interrupted to permit planar movement of the sash perpendicular to its normal direction of movement to allow removal of the sash relative to a supporting window frame. The novel structure includes a resilient member which is manually shiftable in a direction perpendicular to the plane of the window sash when removal of the sash is desired.
    Type: Grant
    Filed: February 5, 1988
    Date of Patent: February 7, 1989
    Inventor: Geoffrey Hitzig