Granted Patent
Utility
US 4,997,424 · App. 07/333,253
Catheter introducer and introducer slitter
Inventor:
Richard L. Little
Patented Case
View Patent ↗
Granted: Mar 5, 1991
Filed: Apr 5, 1989
Inventor
Richard L. Little
Assignee (at issue)
MedAmicus, Inc.
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.