Granted Patent
Utility
US 5,255,751 · App. 07/979,131
Oilfield make-up and breakout tool for top drive drilling systems
Inventor:
Huey Stogner
Patented Case
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Granted: Oct 26, 1993
Filed: Oct 9, 1992
Inventor
Huey Stogner
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.