Patents by Inventor Wilhelmus A. J. Berkers

Wilhelmus A. J. Berkers 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).

  • Chord performing apparatus for an electronic organ
    Patent number: 4383461
    Abstract: A chord performing apparatus for an electronic organ with a chord-former, comprises control inputs for control signals defining the chord tone, and control inputs for control signals defining the chord type and control units which can be preset in accordance with a pattern of chord tones and chord types to be played and outputs which are scanned and controlled in the rhythm of the melody for performing the same function as the switch elements, connected with the control inputs of the chord-former.
    Type: Grant
    Filed: March 28, 1980
    Date of Patent: May 17, 1983
    Inventor: Wilhelmus A. J. Berkers