Granted Patent
Utility
US 4,857,045 · App. 07/111,715
Atherectomy catheter
Inventor:
Mark A. Rydell
Patented Case
View Patent ↗
Granted: Aug 15, 1989
Filed: Oct 23, 1987
Inventor
Mark A. Rydell
Assignee (at issue)
Schneider (U.S.A.), Inc. A Pfizer Company
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.