Granted Patent
Utility
US 6,486,815 · App. 09/890,537
Oversampling circuit and digital/analog converter
Inventor:
Yukio Koyanagi
Patented Case
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Granted: Nov 26, 2002
Filed: Jul 31, 2001
Inventor
Yukio Koyanagi
Assignee (at issue)
Yasue Sakai
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.