Granted Patent
Utility
US 5,219,331 · App. 07/697,249
Pumping system for intravenous administration of a secondary treatment fluid
Inventor:
Timothy W. Vanderveen
Patented Case
View Patent ↗
Granted: Jun 15, 1993
Filed: May 7, 1991
Inventor
Timothy W. Vanderveen
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.