Granted Patent
Utility
US 6,257,680 · App. 09/261,403
Braking system for railroad car/semi-tractor combination
Inventor:
Charles Jacob
Patented Case
View Patent ↗
Granted: Jul 10, 2001
Filed: Mar 3, 1999
Inventor
Charles Jacob
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.