Patents by Inventor James D. Madison

James D. Madison 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).

  • Epicardial defibrillator lead
    Patent number: 5327909
    Abstract: An epicardial defibrillator lead which is placed into a paracardial space adjacent the phrenic nerve and is supported in position by the paracardium wall. A soft-nosed, rounded, blunt-nosed introducer provides for positioning of the defibrillator lead in the paracardial space. The electrode is formed on one side of a polymer member, which is conforming to the left ventricle and the paracardium wall. The electrode has a polymer backing to insulate the electrode from the paracardium wall. The electrode of the defibrillator lead conforms to the geometrical shape of the left ventricle.
    Type: Grant
    Filed: April 26, 1991
    Date of Patent: July 12, 1994
    Assignee: Angeion Corporation
    Inventors: Joseph C. Kiser, James D. Madison