Granted Patent
Utility
US 5,043,666 · App. 07/509,526
Self-calibrating electromagnetic field sensor for locating buried conduits
Inventors:
Russell E. Tavernetti, Paul W. Dodd
Patented Case
View Patent ↗
Granted: Aug 27, 1991
Filed: Apr 16, 1990
Inventors
Russell E. Tavernetti
Paul W. Dodd
Assignee (at issue)
Metrotech Corporation
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.