Granted Patent
Utility
US 5,370,274 · App. 08/124,109
Apparatus for cleaning a wafer surface
Inventors:
Tadahiro Ohmi, Tadashi Shibata
Patented Case
View Patent ↗
Granted: Dec 6, 1994
Filed: Sep 20, 1993
Inventors
Tadahiro Ohmi
Tadashi Shibata
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.