Patents by Inventor David J. McWhinney

David J. McWhinney 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).

  • Portable door stop with knocker
    Patent number: 9085923
    Abstract: Some embodiments provide a door stopper with knocker apparatus for holding open a door. In some embodiments, the door stopper with knocker apparatus comprises a doorstop, a cord, and a knocker. In some embodiments, the door stopper with knocker apparatus is configured to allow an upright person place the doorstop in a position on the ground to hold the door open.
    Type: Grant
    Filed: April 26, 2013
    Date of Patent: July 21, 2015
    Inventor: David J. McWhinney