Patents by Inventor Lawrence J. Keast

Lawrence J. Keast 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).

  • Modified musical instrument keyboard
    Patent number: 4628792
    Abstract: A keyboard for a musical instrument includes at least one series of keys wherein seven keys in the series and five keys correspond to the typical piano or synthesizer white and black keys, respectively. Twelve narrow keys at a third level raised from the level of the black keys, each coupled to switches for producing a respective pitch and wherein the narrow keys are arranged with respect to the white and black keys such that a narrow key comprises every other key.
    Type: Grant
    Filed: May 24, 1985
    Date of Patent: December 16, 1986
    Inventor: Lawrence J. Keast