Patents by Inventor Joseph Victor Chatigny

Joseph Victor Chatigny 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).

  • Reflective mode ultrasonic touch sensitive switch
    Patent number: 5673041
    Abstract: A touch sensitive switch is fabricated from a substrate having a touch region on a first surface and a piezoelectric element on a second surface of the substrate. The piezoelectric element is driven by a signal configured so that an ultrasonic wave generated by the element is transmitted into the substrate and is reflected back and forth into the substrate at both surfaces. A touch changes the reflectivity at the first surface, and influences the impedance of the transducer assembly which is comprised of the piezoelectric element and the substrate.
    Type: Grant
    Filed: August 24, 1995
    Date of Patent: September 30, 1997
    Inventors: Joseph Victor Chatigny, Kyung Tae Park, Minoru Toda