Patents by Inventor John P. Dear

John P. Dear 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).

  • A medical treatment device for treating an undesired formation in a living body
    Patent number: 4926859
    Abstract: Medical treatment device for treating a target in a living body which takes the form of an undesired solid formation, such as a kidney stone (13). The device comprises a chamber (7) for accommodating a charge (5) of low density material , such as a liquid, semi-liquid material or a gel, a nozzle (11) forming an outlet from the chamber, and a receiving aperture closed by a diaphragm (9) which communicates with the chamber (7) and which is arranged to receive a slug (3) of relatively high density material projected at high speed towards the aperture, thereby to transmit the impacting force of the slug to the charge in the chamber so that the charge is extruded through the nozzle (11) as a pulsed jet.
    Type: Grant
    Filed: July 5, 1988
    Date of Patent: May 22, 1990
    Inventors: John E. Field, John P. Dear, Peter N. Davies