Patents by Inventor Bela R. Hatvany

Bela R. Hatvany 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).

  • Display device having unpatterned touch detection
    Patent number: 4476463
    Abstract: A display device locates a touch anywhere on a conductive display faceplate by measuring plural electrical impedances of the faceplate conductive coating. The impedances are at electrodes located on different edges of the faceplate. A touch locating circuit determines the location of a touch using known pulsed signals and, in another embodiment, using a tuned measuring signal.
    Type: Grant
    Filed: August 24, 1981
    Date of Patent: October 9, 1984
    Assignee: Interaction Systems, Inc.
    Inventors: Henry H. Ng, Bela R. Hatvany