Granted Patent
Utility
US 5,600,859 · App. 08/380,956
Dock leveler in which the ramp is raised and lowered using an inflatable member and method of use
Inventors:
Charles H. Hodges, Martin P. Hageman, Monroe Mulder
Patented Case
View Patent ↗
Granted: Feb 11, 1997
Filed: Jan 31, 1995
Inventors
Charles H. Hodges
Martin P. Hageman
Monroe Mulder
Assignee (at issue)
Kelley Company, Inc.
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.