Granted Patent
Utility
US 6,199,708 · App. 09/263,256
Railcar cushioning device with internal elastomeric spring
Inventor:
Jay P. Monaco
Patented Case
View Patent ↗
Granted: Mar 13, 2001
Filed: Mar 5, 1999
Inventor
Jay P. Monaco
Assignee (at issue)
ASF Keystone, 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.