Granted Patent
Utility
US 4,753,487 · App. 06/935,872
Failure switch for braking system proportioning valve
Inventors:
Lloyd G. Bach, Robert F. Gaiser
Patented Case
View Patent ↗
Granted: Jun 28, 1988
Filed: Nov 28, 1986
Inventors
Lloyd G. Bach
Robert F. Gaiser
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.