Granted Patent
Utility
US 4,469,028 · App. 06/335,249
Primary suspension system for a railway car with vertical and longitudinal compliance
Inventor:
Walter C. Dean, II
Patented Case
View Patent ↗
Granted: Sep 4, 1984
Filed: Dec 28, 1981
Inventor
Walter C. Dean, II
Assignee (at issue)
The Budd Company
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.