Granted Patent
Utility
US 5,372,268 · App. 07/865,691
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Inventor:
Hak-Rhim Han
Patented Case
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Granted: Dec 13, 1994
Filed: Apr 8, 1992
Inventor
Hak-Rhim Han
Assignee (at issue)
Minnesota Mining and Manufacturing Company
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.