Granted Patent
Utility
US 5,234,082 · App. 07/724,733
Railroad brake shoe
Inventor:
C. Dale Christie
Patented Case
View Patent ↗
Granted: Aug 10, 1993
Filed: Jul 2, 1991
Inventor
C. Dale Christie
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.