Granted Patent
Utility
US 6,358,408 · App. 09/525,203
Apparatus for the enhancement of water quality in a subterranean pressurized water distribution system
Inventor:
Michael Newman
Patented Case
View Patent ↗
Granted: Mar 19, 2002
Filed: Mar 14, 2000
Inventor
Michael Newman
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.