Patents by Inventor Stephen A. Mackenzie

Stephen A. Mackenzie 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).

  • Patent number: D397147
    Type: Grant
    Filed: January 23, 1997
    Date of Patent: August 18, 1998
    Inventor: Stephen A. Mackenzie