Granted Patent
Utility
US 6,624,774 · App. 09/796,859
Delta sigma D/A converter
Inventors:
Minoru Takeda, Kazuyuki Fujiwara
Patented Case
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Granted: Sep 23, 2003
Filed: Mar 1, 2001
Inventors
Minoru Takeda
Kazuyuki Fujiwara
Assignee (at issue)
Nippon Precision Circuits Inc.
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.