Granted Patent
Utility
US 5,027,059 · App. 07/397,941
Differential current shunt
Inventors:
Arnaud de Montgolfier, R. Wendell Goodwin
Patented Case
View Patent ↗
Granted: Jun 25, 1991
Filed: Aug 24, 1989
Inventors
Arnaud de Montgolfier
R. Wendell Goodwin
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.