Granted Patent
Utility
US 4,223,554 · App. 06/046,472
Hoist test stand
Inventor:
Otmar M. Ulbing
Patented Case
View Patent ↗
Granted: Sep 23, 1980
Filed: Jun 7, 1979
Inventor
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.