Patents by Inventor Rosetta Duff

Rosetta Duff 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).

  • Multi-functional doorstop tool
    Patent number: 8960739
    Abstract: A tool includes a double wedge, a tongue, and a wedge. The double wedge has a top surface, a bottom surface, a front, a rear, a right side, and a left side. The tongue extends from the front of the double wedge and the wedge extends from the rear of the double wedge. Either the tongue or the wedge can be inserted between a door and another surface to hold the door open.
    Type: Grant
    Filed: April 20, 2011
    Date of Patent: February 24, 2015
    Inventors: Robert O. Duff, Rosetta Duff
  • MULTI-FUNCTIONAL DOORSTOP TOOL
    Publication number: 20110254293
    Abstract: A tool includes a double wedge, a tongue, and a wedge. The double wedge has a top surface, a bottom surface, a front, a rear, a right side, and a left side. The tongue extends from the front of the double wedge and the wedge extends from the rear of the double wedge. Either the tongue or the wedge can be inserted between a door and another surface to hold the door open.
    Type: Application
    Filed: April 20, 2011
    Publication date: October 20, 2011
    Inventors: Robert O. Duff, Rosetta Duff