Granted Patent
Utility
US 4,478,459 · App. 06/468,833
Trailer braking system
Inventor:
James C. Cumming
Patented Case
View Patent ↗
Granted: Oct 23, 1984
Filed: Feb 23, 1983
Inventor
James C. Cumming
Assignee (at issue)
Rockwell International Corporation
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.