Patents by Inventor Michael H. Leason

Michael H. Leason 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).

  • Needleless access device
    Patent number: 5360413
    Abstract: A needleless access device and method of using the device is disclosed. The needleless access device has a housing having an inlet opening and an outlet opening and a channel formed therethrough. Movably friction fitted in the channel adjacent the inlet opening is a piston. The piston is biased upwardly by a stretchable element. The stretchable element allows the top of the piston to be depressed by a syringe to a level adjacent internal flow channels to permit injection and aspiration of fluids through the device.
    Type: Grant
    Filed: May 19, 1993
    Date of Patent: November 1, 1994
    Assignee: Filtertek, Inc.
    Inventors: Michael H. Leason, Rick R. Ruschke, Ralph L. Davis