Granted Patent
Utility
US 4,764,166 · App. 07/086,063
Ultrasonic air-in-line detector
Inventor:
Wayne M. Spani
Patented Case
View Patent ↗
Granted: Aug 16, 1988
Filed: Aug 17, 1987
Inventor
Wayne M. Spani
Assignee (at issue)
Fisher Scientific Company, L.L.C.
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.