Granted Patent
Utility
US 4,397,648 · App. 06/204,771
Drop sensing unit and associated drip chamber for IV fluid administration
Inventor:
Wallace L. Knute
Patented Case
View Patent ↗
Granted: Aug 9, 1983
Filed: Nov 7, 1980
Inventor
Wallace L. Knute
Assignee (at issue)
IVAC Corporation
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.