Granted Patent
Utility
US 6,364,012 · App. 09/586,233
Drill pipe handling apparatus
Inventors:
Burt A. Adams, William C. Shafer, Norman A. Henry
Patented Case
View Patent ↗
Granted: Apr 2, 2002
Filed: Jun 2, 2000
Inventors
Burt A. Adams
William C. Shafer
Norman A. Henry
Assignee (at issue)
Oil & Gas Rental Services, Inc.
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.