Granted Patent
Utility
US 6,833,069 · App. 10/193,883
Magnetic filter
Inventor:
Gunther E. Asterlin
Patented Case
View Patent ↗
Granted: Dec 21, 2004
Filed: Jul 12, 2002
Inventor
Gunther E. Asterlin
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.