Granted Patent
Utility
US 4,906,816 · App. 07/196,233
Blood heating apparatus for heating plastic blood supply pouches
Inventor:
Johannes M. L. van Leerdam
Patented Case
View Patent ↗
Granted: Mar 6, 1990
Filed: May 20, 1988
Inventor
Johannes M. L. van Leerdam
Assignee (at issue)
Medistad Holland B.V.
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.