Patents by Inventor David J. Dunham, Sr.

David J. Dunham, Sr. 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).

  • Insert for handheld urinals
    Patent number: 5839123
    Abstract: An insert for handheld urinals for eliminating backflow and spillage of urine includes a funnel portion adapted for securement within a standard handheld urinal bottle. The funnel portion has a central cylindrical portion and an upwardly extending tapered portion. The central cylindrical portion is positionable within an upwardly extending neck of the urinal bottle. The central cylindrical portion has a peripheral gasket disposed on an upper end thereof. The peripheral gasket engages an open mouth of the urinal bottle.
    Type: Grant
    Filed: September 30, 1997
    Date of Patent: November 24, 1998
    Inventor: David J. Dunham, Sr.