Granted Patent
Utility
US 5,167,637 · App. 07/785,575
Valve membrane for a catheter introducer hemostatic valve
Inventors:
Yosuke Okada, Hideyuki Makino
Patented Case
View Patent ↗
Granted: Dec 1, 1992
Filed: Oct 30, 1991
Inventors
Yosuke Okada
Hideyuki Makino
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.