Granted Patent
Utility
US 4,470,780 · App. 06/437,139
Air motor vane lifting device
Inventor:
Robert H. Broyden
Patented Case
View Patent ↗
Granted: Sep 11, 1984
Filed: Oct 27, 1982
Inventor
Robert H. Broyden
Assignee (at issue)
Columbus McKinnon 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.