Patents by Inventor Nathaniel E. Durnan

Nathaniel E. Durnan 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).

  • Drip counter apparatus
    Patent number: 5982289
    Abstract: In apparatus for counting a succession of falling liquid drops having teardrop shape, with a downwardly convex down side, the combination that includes a beam provider for providing a beam of electromagnetic radiation to sidewardly pass into the drop at its convex lower side, to be refracted within the drop to pass out of the drop at its convex lower side, and a beam detector located to detect the refracted beam that has passed sidewardly out of the drop at its convex lower side.
    Type: Grant
    Filed: September 25, 1998
    Date of Patent: November 9, 1999
    Assignee: Dowty Aerospace Yakima
    Inventors: Robert B. Kingsley, Nathaniel E. Durnan