Granted Patent
Utility
US 5,989,438 · App. 08/989,316
Active blood filter and method for active blood filtration
Inventor:
Hideo Fumiyama
Patented Case
View Patent ↗
Granted: Nov 23, 1999
Filed: Dec 12, 1997
Inventor
Hideo Fumiyama
Assignee (at issue)
Baxter International 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.