Granted Patent
Utility
US 4,599,948 · App. 06/346,712
Railway hopper gate locking assembly
Inventor:
Robert W. Randolph
Patented Case
View Patent ↗
Granted: Jul 15, 1986
Filed: Feb 8, 1982
Inventor
Robert W. Randolph
Assignee (at issue)
ACF 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.