Granted Patent
Utility
US 5,201,722 · App. 07/577,941
Two-way outdwelling slit valving of medical liquid flow through a cannula and methods
Inventors:
Robert H. Moorehead, Thomas A. Wiita
Patented Case
View Patent ↗
Granted: Apr 13, 1993
Filed: Sep 4, 1990
Inventors
Robert H. Moorehead
Thomas A. Wiita
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.