Patents by Inventor John R. Hamm

John R. Hamm 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).

  • Submerged marine exhaust system
    Patent number: 5505644
    Abstract: An improved marine engine exhaust system for discharging engine exhaust above the water line when at idle or low speeds, and below the surface of the water at high speed in a submerged turbulent region generated by a hydrodynamic fitting fixed to a the undersurface of the vessel hull, wherein the gas is maintained for a period of time, until the low pressure area following the vessel has passed.
    Type: Grant
    Filed: January 18, 1995
    Date of Patent: April 9, 1996
    Assignee: Ray Industries, Inc.
    Inventors: Frank B. Ousley, II, Douglas A. Keehn, Jr., William W. Powell, John R. Hamm