Granted Patent
Utility
US 4,902,415 · App. 07/221,148
Filtration assembly for peridural anesthesia
Inventor:
Jean Lemonnier
Patented Case
View Patent ↗
Granted: Feb 20, 1990
Filed: Jul 19, 1988
Inventor
Jean Lemonnier
Assignee (at issue)
Millipore 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.