Patents by Inventor Douglas Franklin Ingram

Douglas Franklin Ingram 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).

  • Apparatus for interchangeably affixing a tool to footwear
    Patent number: 6092313
    Abstract: An apparatus is provided which includes a platform to be strapped to the sole of footwear and an attachment carrying a tool which slidingly engages said platform, for providing an apparatus for interchangeably affixing a tool to footwear for work on floor and base board surfaces.
    Type: Grant
    Filed: July 17, 1998
    Date of Patent: July 25, 2000
    Inventors: Gary Earnest Dunlap, Douglas Franklin Ingram