Granted Patent
Utility
US 6,543,533 · App. 09/798,436
Well tubing rotator
Inventors:
Robert K. Meek, Rex E. Duhn
Patented Case
View Patent ↗
Granted: Apr 8, 2003
Filed: Mar 2, 2001
Inventors
Robert K. Meek
Rex E. Duhn
Assignee (at issue)
DUHN OIL TOOL, 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.