Patents by Inventor Leonard A. Schmidt

Leonard A. Schmidt 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).

  • Vibrating string-modulated electronic musical instrument
    Patent number: 3948138
    Abstract: A musical instrument is disclosed which is constructed of a group of taut strings arranged to be strummed, each string being connected to operate an analog switch capable of producing a graduated signal that is directly proportional to the amplitude of vibration of its string, an extrinsic sound source in circuit with each analog switch, the sound source having a variable volume which is varied directly proportional to the strength of the signal from the analog switch, a number of switch means arranged in a keyboard, each of which may close the circuit to one or more preselected sound sources for which the switch means are closed and the strings are vibrating.
    Type: Grant
    Filed: April 28, 1975
    Date of Patent: April 6, 1976
    Inventors: Gary J. Gunn, Richard B. Hodges, Leonard A. Schmidt