Granted Patent
Utility
US 4,553,789 · App. 06/608,688
Dual brake valve with brake proportioning
Inventors:
James G. Pugh, Richard W. Carmichael
Patented Case
View Patent ↗
Granted: Nov 19, 1985
Filed: May 10, 1984
Inventors
James G. Pugh
Richard W. Carmichael
Assignee (at issue)
ALLIED CONSULTING, INC.
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.