Granted Patent
Utility
US 5,651,656 · App. 08/681,557
Rail transportable ramps for loading semi-trailers on trains
Inventor:
Martin Jay Hapeman
Patented Case
View Patent ↗
Granted: Jul 29, 1997
Filed: Jul 29, 1996
Inventor
Martin Jay Hapeman
Assignee (at issue)
General Electric 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.