Granted Patent
Utility
US 5,546,818 · App. 08/444,657
Fluid sampling apparatus having a universal base
Inventor:
Richard Keefer
Patented Case
View Patent ↗
Granted: Aug 20, 1996
Filed: May 19, 1995
Inventor
Richard Keefer
Assignee (at issue)
Isco, 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.