Granted Patent
Utility
US 5,617,897 · App. 08/197,999
Nonreturn valve for medical fluid technologies
Inventor:
Jan Willem Marinus Myers
Patented Case
View Patent ↗
Granted: Apr 8, 1997
Filed: Feb 16, 1994
Inventor
Jan Willem Marinus Myers
Assignee (at issue)
Schawk, Inc
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.