Granted Patent
Utility
US 5,160,429 · App. 07/635,590
Piping system for supplying ultra-pure water
Inventors:
Tadahiro Ohmi, Michiya Kawakami, Tadashi Shibata, Masaru Umeda
Patented Case
View Patent ↗
Granted: Nov 3, 1992
Filed: Dec 31, 1990
Inventors
Tadahiro Ohmi
Michiya Kawakami
Tadashi Shibata
Masaru Umeda
Assignee (at issue)
Tadahiro Ohmi
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.