Granted Patent
Utility
US 6,276,464 · App. 09/500,820
Stake coupler for a horizontal directional drill
Inventors:
Robert G. Draney, Donald C. Sassor, Jeffrey S. Volden
Patented Case
View Patent ↗
Granted: Aug 21, 2001
Filed: Feb 10, 2000
Inventors
Robert G. Draney
Donald C. Sassor
Jeffrey S. Volden
Assignee (at issue)
Case GmbH
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.