Granted Patent
Utility
US 6,047,839 · App. 09/017,383
Rail car buffer
Inventor:
Russell J Huggins
Patented Case
View Patent ↗
Granted: Apr 11, 2000
Filed: Feb 3, 1998
Inventor
Russell J Huggins
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.