Granted Patent
Utility
US 6,719,044 · App. 09/802,085
Wear bushing running and retrieval tools
Inventors:
David L. Ford, Kevin R. Koen, Fergus Coutts Hines
Patented Case
View Patent ↗
Granted: Apr 13, 2004
Filed: Mar 8, 2001
Inventors
David L. Ford
Kevin R. Koen
Fergus Coutts Hines
Assignee (at issue)
ABB Vetco Gray 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.