Granted Patent
Utility
US 6,015,271 · App. 09/172,400
Stowable walking beam pumping unit
Inventors:
LeMoyne Boyer, Robert M. Jones
Patented Case
View Patent ↗
Granted: Jan 18, 2000
Filed: Oct 14, 1998
Inventors
LeMoyne Boyer
Robert M. Jones
Assignee (at issue)
Lufkin Industries, LLC
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.