Patents by Inventor Siegfried Eppinger

Siegfried Eppinger 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).

  • Potentiometer device
    Patent number: 4780701
    Abstract: A potentiometer device including a resistor path and a conductive film spaced therefrom. The film may be brought in contact with the resistor by exerting finger pressure. The tap voltage is stored in a memory and displayed by means of LEDs.
    Type: Grant
    Filed: February 11, 1987
    Date of Patent: October 25, 1988
    Inventor: Siegfried Eppinger
  • Electronic keyboard musical instrument with processing of depression dynamics
    Patent number: 4765218
    Abstract: A keyboard circuit for an electronic musical instrument which, with the depression of a key, couples an AC signal to an allocated multiplexer input. The output of the multiplexer is connected via a rectifier and a sample-and-hold circuit to a depression recognizing circuit. The coupling is preferably inductive.
    Type: Grant
    Filed: September 19, 1986
    Date of Patent: August 23, 1988
    Assignee: Matth. Hohner AG
    Inventor: Siegfried Eppinger