Granted Patent
Utility
US 4,988,009 · App. 07/349,613
Telescopic boom mobile cranes
Inventor:
John Atkinson
Patented Case
View Patent ↗
Granted: Jan 29, 1991
Filed: May 10, 1989
Inventor
John Atkinson
Assignee (at issue)
Grove Coles Limited
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.