Granted Patent
Utility
US 4,658,244 · App. 06/716,862
Air-in-line detector
Inventor:
Robert S. Meijer
Patented Case
View Patent ↗
Granted: Apr 14, 1987
Filed: Mar 28, 1985
Inventor
Robert S. Meijer
Assignee (at issue)
Imed 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.