Granted Patent
Utility
US 6,809,890 · App. 10/158,166
Method for manufacturing silicon wafer and silicon wafer
Inventors:
Satoshi Do, Isao Onuma
Patented Case
View Patent ↗
Granted: Oct 26, 2004
Filed: May 31, 2002
Inventors
Satoshi Do
Isao Onuma
Assignee (at issue)
Milestone 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.