Granted Patent
Utility
US 4,570,544 · App. 06/388,909
Diagonally braced rail truck
Inventor:
Roy E. Smith
Patented Case
View Patent ↗
Granted: Feb 18, 1986
Filed: Jun 16, 1982
Inventor
Roy E. Smith
Assignee (at issue)
Urban Transportation Development Corp., Ltd.
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.