Granted Patent
Utility
US 4,222,614 · App. 06/013,964
Surge control for electrical trailer brakes
Inventor:
John A. Spechko
Patented Case
View Patent ↗
Granted: Sep 16, 1980
Filed: Feb 22, 1979
Inventor
John A. Spechko
Assignee (at issue)
Warner Electric Brake & Clutch Company
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.