Patents by Inventor J. Dennis Lawson

J. Dennis Lawson 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).

  • Flute
    Patent number: 4376403
    Abstract: The flute invention relates to fingering mechanisms. More readily attained and maintained technical competence in playing the flute is enabled by facilitator mechanism (13) for improved actuation of the B flat key. Facilitator mechanism (14) includes a rocker bar (54) coupling the Briccialdi B flat lever to the rod assembly sections carrying the B flat key and the G key. Coupling between the G sharp lever and the B flat key is maintained by cam (67, 81) and plate (68, 82).
    Type: Grant
    Filed: May 1, 1981
    Date of Patent: March 15, 1983
    Assignee: Walter Haedrich
    Inventors: Walter Haedrich, J. Dennis Lawson