Granted Patent
Utility
US 4,271,839 · App. 06/060,408
Dilation catheter method and apparatus
Inventors:
Thomas J. Fogarty, Albert K. Chin
Patented Case
View Patent ↗
Granted: Jun 9, 1981
Filed: Jul 25, 1979
Inventors
Thomas J. Fogarty
Albert K. Chin
Assignee (at issue)
Thomas J. Fogarty
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.