Granted Patent
Utility
US 6,769,514 · App. 10/036,387
Helicopter lineman's ladder and method for energized powerline repair
Inventor:
Darryl K. Ed
Patented Case
View Patent ↗
Granted: Aug 3, 2004
Filed: Jan 7, 2002
Inventor
Darryl K. Ed
Assignee (at issue)
Haverfield Corporation
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.