Granted Patent
Utility
US 4,491,372 · App. 06/483,972
Penalty brake application nullification-prevention system
Inventor:
Esmet Walley
Patented Case
View Patent ↗
Granted: Jan 1, 1985
Filed: Apr 11, 1983
Inventor
Esmet Walley
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.