Granted Patent
Utility
US 5,392,039 · App. 07/886,588
Sigma-delta analog to digital converter
Inventor:
Andrew Thurston
Patented Case
View Patent ↗
Granted: Feb 21, 1995
Filed: May 21, 1992
Inventor
Andrew Thurston
Assignee (at issue)
GEC-Marconi Lmited
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.