Granted Patent
Utility
US 6,540,307 · App. 08/952,673
Emergency brake system using a load-responsive apportioning valve
Inventors:
Andrew John Ward, David Charles Hurst
Patented Case
View Patent ↗
Granted: Apr 1, 2003
Filed: Jan 9, 1998
Inventors
Andrew John Ward
David Charles Hurst
Assignee (at issue)
Lucas Industries plc
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.