Patents by Inventor Alexander Krivka

Alexander Krivka 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).

  • Steam-powered aircraft
    Patent number: 3930625
    Abstract: A steam generator on the aircraft selectively delivers high-pressure steam to atmospheric discharge jets on a lift rotor and/or to peripheral jets on a forwardly-directed propulsion propeller. The propeller is enclosed by a hollow shroud into which the steam jets discharge so that the shroud acts both as a propeller efficiency-enhancing device and a steam condenser to permit recycling of the condensate.
    Type: Grant
    Filed: September 3, 1974
    Date of Patent: January 6, 1976
    Inventor: Alexander Krivka