Granted Patent
Utility
US 4,192,239 · App. 05/866,483
Series pneumatic and coil spring railway car suspension
Inventor:
John Paul
Patented Case
View Patent ↗
Granted: Mar 11, 1980
Filed: Jan 3, 1978
Inventor
John Paul
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.