Granted Patent
Utility
US 6,348,947 · App. 08/597,035
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Inventor:
Takayuki Hatase
Patented Case
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Granted: Feb 19, 2002
Filed: Feb 5, 1996
Inventor
Takayuki Hatase
Assignee (at issue)
SUMITOMO ELECTRIC INDUSTRIES, 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.