Granted Patent
Utility
US 3,978,857 · App. 05/546,509
System with filter for administrating parenteral liquids
Inventor:
Charles J. McPhee
Patented Case
View Patent ↗
Granted: Sep 7, 1976
Filed: Feb 3, 1975
Inventor
Charles J. McPhee
Assignee (at issue)
American Hospital Supply Corp.
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.