Granted Patent
Utility
US 5,664,932 · App. 08/309,225
Pivoted lifting device
Inventors:
David M. Clonch, Freddy D. Boyd, Michael J. Cook
Patented Case
View Patent ↗
Granted: Sep 9, 1997
Filed: Sep 20, 1994
Inventors
David M. Clonch
Freddy D. Boyd
Michael J. Cook
Assignee (at issue)
Long-Airdox Company
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.