Granted Patent
Utility
US 6,089,332 · App. 09/004,592
Steerable rotary drilling systems
Inventors:
John D. Barr, John Martin Clegg, William C. Motion
Patented Case
View Patent ↗
Granted: Jul 18, 2000
Filed: Jan 8, 1998
Inventors
John D. Barr
John Martin Clegg
William C. Motion
Assignee (at issue)
Camco International (UK) Limited
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.