Patents by Inventor Richard Burtschi

Richard Burtschi 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).

  • Artificial larynx with semi-automatic inflection control
    Patent number: 4039756
    Abstract: An artificial larynx helps people speak with less monotonous voice by providing an automatic pitch changer for voice inflection. The predetermined basic vocal pitch frequency circuit is modulated by a frequency control signal whose value changes at a predetermined rate established by an RC circuit, and includes switches manually-operable to select upward or downward pitch change inflections.
    Type: Grant
    Filed: November 17, 1976
    Date of Patent: August 2, 1977
    Assignee: Missouri Province Educational Institute
    Inventor: Richard Burtschi