Patents by Inventor Keith R. Hildebrandt

Keith R. Hildebrandt 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).

  • Method for iontophoretically delivering drug adjacent to a heart
    Patent number: 5499971
    Abstract: A drug delivery apparatus and method for iontophoretically delivering a drug locally to internal body tissue. The iontophoretic delivery apparatus and method include a current source producing a net flow of current in a desired direction with high frequency waveforms which enhance delivery and minimize side effects typically associated with iontophoresis.The invention contemplates positioning a drug delivery device in a body passageway or within body tissue and then selectively introducing a selected drug so that it is iontophoretically transported across a drug transport wall of the device for direct contact with the passageway wall or body tissue. A further aspect of the present invention involves treating a dilated vessel in the area of a stenotic lesion with a fixative or other drug to render the vessel biologically inert and to form a biological stent or prevent restenosis using specifically selected drugs.
    Type: Grant
    Filed: December 14, 1993
    Date of Patent: March 19, 1996
    Assignee: Cortrak Medical, Inc.
    Inventors: James E. Shapland, Keith R. Hildebrandt, Mark B. Knudson