Granted Patent
Utility
US 4,552,398 · App. 06/570,135
Tractor-trailor brake acceleration system
Inventor:
John Risley
Patented Case
View Patent ↗
Granted: Nov 12, 1985
Filed: Jan 12, 1984
Inventor
John Risley
Assignee (at issue)
International Harvester 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.