Granted Patent
Utility
US 4,904,027 · App. 07/252,941
Digital air brake control system
Inventors:
Elmer T. Skantar, Walter J. Sanders
Patented Case
View Patent ↗
Granted: Feb 27, 1990
Filed: Oct 3, 1988
Inventors
Elmer T. Skantar
Walter J. Sanders
Assignee (at issue)
American Standard 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.