Granted Patent
Utility
US 4,997,431 · App. 07/400,702
Catheter
Inventors:
Jeffrey M. Isner, Richard H. Clarke
Patented Case
View Patent ↗
Granted: Mar 5, 1991
Filed: Aug 30, 1989
Inventors
Jeffrey M. Isner
Richard H. Clarke
Assignee (at issue)
Angeion Corp.
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.