Patents by Inventor David De Rosa

David De Rosa 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).

  • Electronic musical instrument
    Patent number: 3938419
    Abstract: A musical wind instrument of the type having a plurality of valves, the opening and closing of which is normally used to control the instrument frequency, is combined with a music synthesizer of the type including a voltage controlled oscillator. The voltage applied to the oscillator is controlled by means connected to the instrument valves so that the applied voltage varies in response to the opening and closing of the valves.
    Type: Grant
    Filed: May 20, 1974
    Date of Patent: February 17, 1976
    Inventor: David De Rosa