Granted Patent
Utility
US 5,152,228 · App. 07/710,099
Universal coupling adapter for rail-highway vehicles
Inventor:
Thomas G. Donkin
Patented Case
View Patent ↗
Granted: Oct 6, 1992
Filed: Jun 4, 1991
Inventor
Thomas G. Donkin
Assignee (at issue)
Wabash National 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.