Granted Patent
Utility
US 4,230,048 · App. 05/851,154
Railroad car
Inventors:
Robert L. Gordon, Oscar Weingart, Harry A. King, James V. Springrose
Patented Case
View Patent ↗
Granted: Oct 28, 1980
Filed: Nov 14, 1977
Inventors
Robert L. Gordon
Oscar Weingart
Harry A. King
James V. Springrose
Assignees (at issue)
Structural Composite Industries, Inc.
Cargill, 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.