Granted Patent
Utility
US 6,241,893 · App. 08/819,999
Water filtration media, apparatus and processes
Inventor:
Ehud Levy
Patented Case
View Patent ↗
Granted: Jun 5, 2001
Filed: Mar 18, 1997
Inventor
Ehud Levy
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.