Granted Patent
Utility
US 5,521,572 · App. 08/337,910
Unshielded air-coupled current transformer
Inventors:
R. Wendell Goodwin, Charles W. Roberts
Patented Case
View Patent ↗
Granted: May 28, 1996
Filed: Nov 14, 1994
Inventors
R. Wendell Goodwin
Charles W. Roberts
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.