Granted Patent
Utility
US 4,825,493 · App. 07/084,362
Dock-leveler lock
Inventor:
Hoa Nguyen
Patented Case
View Patent ↗
Granted: May 2, 1989
Filed: Aug 12, 1987
Inventor
Hoa Nguyen
Assignee (at issue)
TI Serco 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.