Granted Patent
Utility
US 5,439,596 · App. 08/167,981
Method of producing pure water, system therefor and cleaning method therefor
Inventors:
Tadahiro Ohmi, Isamu Sugiyama
Patented Case
View Patent ↗
Granted: Aug 8, 1995
Filed: Jan 27, 1994
Inventors
Tadahiro Ohmi
Isamu Sugiyama
Assignee (at issue)
Tadahiro Phmi
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.