Granted Patent
Utility
US 6,416,291 · App. 09/602,831
Fluid flow resistance monitoring system
Inventors:
Robert D. Butterfield, Allen Farquhar
Patented Case
View Patent ↗
Granted: Jul 9, 2002
Filed: Jun 23, 2000
Inventors
Robert D. Butterfield
Allen Farquhar
Assignee (at issue)
Alaris Medical Systems, 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.