Granted Patent
Utility
US 4,567,975 · App. 06/581,279
Apparatus and method for controlling the engagement of a gap-type electromagnetic coupling and for alleviating engagement noise
Inventor:
Thomas P. Roll
Patented Case
View Patent ↗
Granted: Feb 4, 1986
Filed: Feb 17, 1984
Inventor
Thomas P. Roll
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.