Granted Patent
Utility
US 6,299,589 · App. 09/038,375
Flow-through treatment method
Inventor:
David S. Utterberg
Patented Case
View Patent ↗
Granted: Oct 9, 2001
Filed: Mar 11, 1998
Inventor
David S. Utterberg
Assignee (at issue)
DSU Medical Corp.
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.