Granted Patent
Utility
US 5,157,801 · App. 07/650,373
Dock leveler having automatically actuated vehicle barrier
Inventor:
James C. Alexander
Patented Case
View Patent ↗
Granted: Oct 27, 1992
Filed: Jan 30, 1991
Inventor
James C. Alexander
Assignee (at issue)
Serco
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.