Patents by Inventor John P. Francis

John P. Francis 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).

  • Concentric layer ramjet fuel
    Patent number: 4729317
    Abstract: An air-breathing solid fuel rocket motor containing a solid fuel ramjet gn having a plurality of concentric layers of solid fuel which provide a means of controlling the thrust of the motor.
    Type: Grant
    Filed: December 8, 1986
    Date of Patent: March 8, 1988
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: George W. Burdette, John P. Francis
  • Van roof rack
    Patent number: D265815
    Type: Grant
    Filed: June 16, 1980
    Date of Patent: August 17, 1982
    Inventor: John P. Francis