Granted Patent
Utility
US 5,461,306 · App. 08/174,104
DC current detection system for a current transformer
Inventor:
Rex Carswell George Niven
Patented Case
View Patent ↗
Granted: Oct 24, 1995
Filed: Dec 28, 1993
Inventor
Rex Carswell George Niven
Assignee (at issue)
Schlumberger Industires, S.A.
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.