Patents by Inventor David Douglas Winters

David Douglas Winters 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-purpose perambulation aid with concealed locking means
    Patent number: 9833049
    Abstract: A multi-purpose device with concealed locking means having a first tube, sliding tube, lock hole, locking button hole, locking button, sheath, bias element, tip, handle, compression ring, and friction gasket.
    Type: Grant
    Filed: November 17, 2015
    Date of Patent: December 5, 2017
    Inventor: David Douglas Winters
  • Adjustable walking aid
    Patent number: D740543
    Type: Grant
    Filed: November 12, 2013
    Date of Patent: October 13, 2015
    Inventor: David Douglas Winters