Granted Patent
Utility
US 6,413,019 · App. 09/691,736
Turret rock bolter with stinger/centralizer
Inventors:
Perry L. Coombs, Paul Bigoney, Ward D. Morrison
Patented Case
View Patent ↗
Granted: Jul 2, 2002
Filed: Oct 18, 2000
Inventors
Perry L. Coombs
Paul Bigoney
Ward D. Morrison
Assignee (at issue)
Oldenburg Cannon, 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.