Patents by Inventor David A. Winchell, deceased

David A. Winchell, deceased 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).

  • Biopsy needle assembly
    Patent number: 5538009
    Abstract: A bone marrow biopsy needle assembly includes an elongated tubular cannula having an axially extending lumen therethrough, and a cannula handle attached to the proximal end of the cannula, the cannula handle extending transversely to the axis of the cannula and having a cavity aligned with and open to the proximal end of the cannula. The handle is provided with a cover connected to the cannula by means of a living hinge. A stylet having a knob affixed to its proximal end which knob is sized to fit within the cavity with the stylet slidably received within the cannula lumen. The cavity is provided with projections that engage the knob to prevent relative rotation between the stylet and the cannula. A guide is provided to facilitate insertion of a stylet into the cannula for sample removal.
    Type: Grant
    Filed: July 21, 1994
    Date of Patent: July 23, 1996
    Assignee: Baxter International, Inc.
    Inventors: John R. Byrne, Jan L. Como, Gregory D. Volan, Stephen Kuehn, Terrence W. Snyder, T. Michael Dennehey, David A. Winchell, deceased