Granted Patent
Utility
US 6,344,812 · App. 09/587,870
Delta sigma digital-to-analog converter
Inventors:
Minoru Takeda, Yoshihiro Hanada
Patented Case
View Patent ↗
Granted: Feb 5, 2002
Filed: Jun 6, 2000
Inventors
Minoru Takeda
Yoshihiro Hanada
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.