Granted Patent
Utility
US 6,161,232 · App. 09/321,723
Invalid lifting device
Inventors:
Philip Von Schroeter, John Greaves
Patented Case
View Patent ↗
Granted: Dec 19, 2000
Filed: May 28, 1999
Inventors
Philip Von Schroeter
John Greaves
Assignee (at issue)
Arjo 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.