Granted Patent
Utility
US 5,660,087 · App. 08/512,490
Drill pipe spinner
Inventor:
Donald D. Rae
Patented Case
View Patent ↗
Granted: Aug 26, 1997
Filed: Aug 8, 1995
Inventor
Donald D. Rae
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.