Granted Patent
Utility
US 6,543,009 · App. 09/509,678
Signal processing apparatus
Inventors:
Yasushi Ueda, Takahiro Watanabe
Patented Case
View Patent ↗
Granted: Apr 1, 2003
Filed: Jun 15, 2000
Inventors
Yasushi Ueda
Takahiro Watanabe
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.