Granted Patent
Utility
US 4,674,639 · App. 06/659,184
Railway coupler carrier retention system
Inventor:
John W. Kaim
Patented Case
View Patent ↗
Granted: Jun 23, 1987
Filed: Oct 9, 1984
Inventor
John W. Kaim
Assignee (at issue)
AMSTED INDUSTRIES INCORPORATED
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.