Patents by Inventor Andre Kunz

Andre Kunz 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).

  • Apparatus for recording and verifying handwriting, in particular signatures
    Patent number: 5013874
    Abstract: A signature verification tablet comprises two piezo-electric membranes each having a plurality of line electrodes on one side. The membranes are sandwiched together, with the line electrodes on one membrane at right angles to the line electrodes on the other. The line electrodes on each membrane are connected together in three interleaved sets, so that when a signature is written on the tablet, a series of pulses is produced containing direction and speed of movement information from which the authenticity of the signature can be verified.
    Type: Grant
    Filed: March 7, 1989
    Date of Patent: May 7, 1991
    Assignee: Ellett Brothers
    Inventors: Pieter de Bruyne, Andre Kunz