Granted Patent
Utility
US 6,474,488 · App. 09/590,336
Electrical contact coupling for automatic center- or central buffer couplings for rail vehicles
Inventor:
John Sullivan
Patented Case
View Patent ↗
Granted: Nov 5, 2002
Filed: Jun 8, 2000
Inventor
John Sullivan
Assignee (at issue)
Scharfenbergkupplung GmbH & Co. KG
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.