Granted Patent
Utility
US 4,520,247 · App. 06/586,217
Pendant type electrical switching device
Inventors:
James J. Pancook, Otmar M. Ulbing
Patented Case
View Patent ↗
Granted: May 28, 1985
Filed: Mar 5, 1984
Inventors
James J. Pancook
Otmar M. Ulbing
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.