Granted Patent
Utility
US 6,647,718 · App. 09/970,761
Electronically controlled hydraulic system for lowering a boom in an emergency
Inventor:
Dwight B. Stephenson
Patented Case
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Granted: Nov 18, 2003
Filed: Oct 4, 2001
Inventor
Dwight B. Stephenson
Assignee (at issue)
HUSCO International, 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.