Granted Patent
Utility
US 4,643,713 · App. 06/667,985
Venous reservoir
Inventor:
Daniel W. Viitala
Patented Case
View Patent ↗
Granted: Feb 17, 1987
Filed: Nov 5, 1984
Inventor
Daniel W. Viitala
Assignee (at issue)
Baxter Travenol Laboratories, 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.