Granted Patent
Utility
US 4,779,384 · App. 06/828,984
Rail grinder
Inventors:
John J. Shoenhair, Darrell E. Johnson, Richard J. Gitter, Bernard C. Lancette, Winfred C. Croft
Patented Case
View Patent ↗
Granted: Oct 25, 1988
Filed: Feb 13, 1986
Inventors
John J. Shoenhair
Darrell E. Johnson
Richard J. Gitter
Bernard C. Lancette
Winfred C. Croft
Assignee (at issue)
HARSCO CORPORATION
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.