Patents by Inventor Fernand Kummer

Fernand Kummer 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).

  • Escapement mechanism for upright piano
    Patent number: 4840101
    Abstract: The prolongation of a jack in the escapement mechanism of an upright piano is provided with a repetition lever having a roller that is engageable with a vertically adjustable repetition button positioned beneath the roller so that priming of the mechanism begins from the moment the wippen enters its downstroke movement.
    Type: Grant
    Filed: September 26, 1988
    Date of Patent: June 20, 1989
    Inventor: Fernand Kummer