Granted Patent
Utility
US 4,857,930 · App. 06/879,771
Circuit for reducing differential nonlinearities in multi-stage digital-to-analog converters
Inventor:
Charles H. Lucas
Patented Case
View Patent ↗
Granted: Aug 15, 1989
Filed: Jun 27, 1986
Inventor
Charles H. Lucas
Assignee (at issue)
Hughes Aircraft Company
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.