Patents by Inventor Otto A. Trnka, deceased

Otto A. Trnka, deceased 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).

  • Hose coupling
    Patent number: 4157843
    Abstract: A singly or doubly tapered sleeve for gripping a hose in a hose coupler so that the gripping action on the hose is modified by changes in water pressure in and end pulls on the hose.
    Type: Grant
    Filed: October 25, 1977
    Date of Patent: June 12, 1979
    Inventors: Otto A. Trnka, deceased, by Bertha E. Trnka, administrator, Gilbert Trnka, administrator