Granted Patent
Utility
US 5,209,021 · App. 07/753,037
Apparatus and method for sprue removal and grinding of railroad wheels
Inventors:
C. Dale Christie, Charles W. Taff, Jaime F. Pozo
Patented Case
View Patent ↗
Granted: May 11, 1993
Filed: Aug 30, 1991
Inventors
C. Dale Christie
Charles W. Taff
Jaime F. Pozo
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.