Patents by Inventor Bela Ranky

Bela Ranky 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).

  • Combination of active and passive filters
    Patent number: 5072200
    Abstract: A combination of passive electrical filters and active electrical filters in a series arrangement forming active passive band pass or high pass or low pass or band reject filters. The preferred embodiment includes an amplifier stage to include high input impedance. These filter combinations are free of internal electrical noise.
    Type: Grant
    Filed: November 2, 1990
    Date of Patent: December 10, 1991
    Inventor: Bela Ranky