Patents by Inventor Dennis D. Doblar

Dennis D. Doblar 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).

  • Rotary valve especially useful in a medical system including a flow-directed venous catheter
    Patent number: 4397335
    Abstract: A rotary valve, especially designed for use in medical systems, has an arrangement of passageways in its rotary valve plug and ports in its housing that permit manual manipulation of the valve to switch the medical system from monitoring pulmonary artery pressure to measuring central venous pressure. The system can also be used for cardiac output measurement or for the withdrawal of a mixed venous blood sample. Patient trauma and contamination are avoided.
    Type: Grant
    Filed: May 26, 1981
    Date of Patent: August 9, 1983
    Inventors: Dennis D. Doblar, John C. Hinkle