Patents by Inventor John A. Slevinsky

John A. Slevinsky 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).

  • Input current responsive, tap changing transformer system
    Patent number: 5289110
    Abstract: A system for providing a constant current to airport or airfield signs is disclosed. The system receives input currents of varying amperages which also supply, and allow dimming of, runway or taxiway lights. According to various exemplary embodiments of the present invention, a high power factor is achieved which provides greater cost efficient operation of the signs.
    Type: Grant
    Filed: October 14, 1992
    Date of Patent: February 22, 1994
    Assignee: Cooper Industries
    Inventor: John A. Slevinsky