Granted Patent
Utility
US 5,643,190 · App. 08/373,598
Flow-through treatment device
Inventor:
David S. Utterberg
Patented Case
View Patent ↗
Granted: Jul 1, 1997
Filed: Jan 17, 1995
Inventor
David S. Utterberg
Assignee (at issue)
Medisystems Technology Corporation
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.