Patents by Inventor Desmond C. Prevatt

Desmond C. Prevatt 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).

  • Tongue locking device
    Patent number: 4196724
    Abstract: A suction producing formation is elastically contracted to apply suction upon release, to a tongue receiving receptacle inserted into the mouth of a patient. The tongue tip is thereby wedgingly engaged with the rearwardly converging walls of the receptacle to seal a connecting conduit so as to maintain a suction holding pressure on the tongue.
    Type: Grant
    Filed: January 31, 1978
    Date of Patent: April 8, 1980
    Inventors: Winton W. Wirt, Desmond C. Prevatt, William H. Frecker