Granted Patent
Utility
US 4,790,331 · App. 06/936,854
Method for placement of catheter in a blood vessel
Inventors:
Yosuke Okada, Munehito Kurimoto
Patented Case
View Patent ↗
Granted: Dec 13, 1988
Filed: Dec 2, 1986
Inventors
Yosuke Okada
Munehito Kurimoto
Assignee (at issue)
Sherwood Medical 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.