Patents by Inventor Douglas L. Green

Douglas L. Green 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).

  • Whistle
    Patent number: D298841
    Type: Grant
    Filed: November 19, 1985
    Date of Patent: December 6, 1988
    Inventor: Douglas L. Green
  • Hair shampooing device
    Patent number: D672918
    Type: Grant
    Filed: May 14, 2012
    Date of Patent: December 18, 2012
    Inventor: Douglas L. Green