Granted Patent
Utility
US 5,593,507 · App. 08/355,312
Cleaning method and cleaning apparatus
Inventors:
Minoru Inada, Yasutaka Imajo, Masahide Uchino
Patented Case
View Patent ↗
Granted: Jan 14, 1997
Filed: Dec 12, 1994
Inventors
Minoru Inada
Yasutaka Imajo
Masahide Uchino
Assignees (at issue)
Kabushiki Kaisha Toshiba
Japan Field Co., Ltd.
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.