Patents by Inventor Francis G. Davies

Francis G. Davies 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).

  • Backfill machine
    Patent number: 4912862
    Abstract: The invention comprises a mobile backfilling machine wherein raw materials located adjacent an excavated trench are picked up, graded and delivered to the open trench in an order of size grading from finest to coarsest, thereby providing a fine material padding for a product which has been placed into the trench. The machine may also be used to place a warning ribbon into the trench at a point above the padding.
    Type: Grant
    Filed: January 9, 1989
    Date of Patent: April 3, 1990
    Inventors: William B. Bishop, Francis G. Davies