Granted Patent
Utility
US 6,547,761 · App. 09/755,588
Drainage catheter
Inventor:
Clifford M. Liu
Patented Case
View Patent ↗
Granted: Apr 15, 2003
Filed: Jan 5, 2001
Inventor
Clifford M. Liu
Assignee (at issue)
Scimed Life Systems, 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.