Patents by Inventor Sidney T. Dvorak

Sidney T. Dvorak 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).

  • AC Electrical power systems with alternate sources of power
    Patent number: 4186312
    Abstract: AC electrical power system comprising an electrical alternator and a primary power source which is alternatively and automatically utilizable with an emergency power source when the primary power source fails, the primary power source being either a wind-driven impeller or a water-driven turbine which are selectively and alternatively utilized.
    Type: Grant
    Filed: February 23, 1978
    Date of Patent: January 29, 1980
    Inventor: Sidney T. Dvorak
  • Flame and heat-resistant luggage case
    Patent number: 3980162
    Abstract: Flame and heat-resistant luggage case constructed of flame-resistant laminated materials and having a surrounding air space, when in closed position, to act as a heat-insulating means.
    Type: Grant
    Filed: September 4, 1975
    Date of Patent: September 14, 1976
    Inventor: Sidney T. Dvorak