Granted Patent
Utility
US 6,323,798 · App. 09/672,263
Switched capacitor type digital-analog converter which generates an analog driving signal from a digital signal by activation of a capacitor
Inventor:
Katsumi Abe
Patented Case
View Patent ↗
Granted: Nov 27, 2001
Filed: Sep 28, 2000
Inventor
Katsumi Abe
Assignee (at issue)
NEC CORPORATION
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.