Granted Patent
Utility
US 6,041,874 · App. 08/945,863
Tubular actuator component for use in a drill string
Inventor:
Paul Bernard Lee
Patented Case
View Patent ↗
Granted: Mar 28, 2000
Filed: Apr 28, 1998
Inventor
Paul Bernard Lee
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.