Granted Patent
Utility
US 5,771,935 · App. 08/781,011
Check valve, especially for the medical technique
Inventor:
Jan Willem Marinus Myers
Patented Case
View Patent ↗
Granted: Jun 30, 1998
Filed: Jan 9, 1997
Inventor
Jan Willem Marinus Myers
Assignee (at issue)
FILTERTEK B.V.
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.