Patents by Inventor Joshua E. Knapp

Joshua E. Knapp 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).

  • Oxygen tank key
    Patent number: D611786
    Type: Grant
    Filed: December 31, 2007
    Date of Patent: March 16, 2010
    Inventor: Joshua E. Knapp
  • Oxygen tank key
    Patent number: D611787
    Type: Grant
    Filed: December 31, 2007
    Date of Patent: March 16, 2010
    Inventor: Joshua E. Knapp
  • Oxygen tank key
    Patent number: D621674
    Type: Grant
    Filed: March 9, 2010
    Date of Patent: August 17, 2010
    Inventor: Joshua E. Knapp