Granted Patent
Utility
US 6,715,559 · App. 10/004,963
Gripper assembly for downhole tractors
Inventors:
Duane Bloom, Norman Bruce Moore
Patented Case
View Patent ↗
Granted: Apr 6, 2004
Filed: Dec 3, 2001
Inventors
Duane Bloom
Norman Bruce Moore
Assignee (at issue)
Western Well 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.