Patents by Inventor John K. Pringle

John K. Pringle 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).

  • Armor
    Patent number: 4355562
    Abstract: A new, lightweight armor plating for important installations or control cers is disclosed whereupon being struck by a projectile restricts the ensuing shock wave to a narrow beam-like path always perpendicular to patterns of striation engrained in said armor. This response dissipates the projectile's kinetic energy more rapidly. The new armor is lighter than traditional forms of armor.
    Type: Grant
    Filed: March 12, 1980
    Date of Patent: October 26, 1982
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Robert G. S. Sewell, John K. Pringle, Marvin E. Backman, Stephen A. Finnegan