Granted Patent
Utility
US 4,452,148 · App. 06/297,292
Cushioned center plate structure for a railway vehicle body and method of making same
Inventor:
Julien C. Mathieu
Patented Case
View Patent ↗
Granted: Jun 5, 1984
Filed: Aug 28, 1981
Inventor
Julien C. Mathieu
Assignee (at issue)
DayCo Holdings, LP
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.