Granted Patent
Utility
US 6,702,041 · App. 09/794,711
Combined logging and drilling system
Inventor:
Douwe Johannes Runia
Patented Case
View Patent ↗
Granted: Mar 9, 2004
Filed: Feb 27, 2001
Inventor
Douwe Johannes Runia
Assignee (at issue)
SHELL OIL COMPANY
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.