Granted Patent
Utility
US 6,238,412 · App. 09/189,574
Biological passageway occlusion removal
Inventors:
William Dubrul, Richard Eustis Fulton, III
Patented Case
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Granted: May 29, 2001
Filed: Nov 11, 1998
Inventors
William Dubrul
Richard Eustis Fulton, III
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.