Granted Patent
Utility
US 6,616,633 · App. 08/933,709
Apparatus and method for air-in-line detection
Inventors:
Robert D. Butterfield, Allen Farquhar
Patented Case
View Patent ↗
Granted: Sep 9, 2003
Filed: Sep 19, 1997
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.