Granted Patent
Utility
US 4,442,903 · App. 06/389,195
System for installing continuous anode in deep bore hole
Inventors:
William R. Schutt, Stephen Booth
Patented Case
View Patent ↗
Granted: Apr 17, 1984
Filed: Jun 17, 1982
Inventors
William R. Schutt
Stephen Booth
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.