Granted Patent
Utility
US 4,894,492 · App. 07/239,506
Motor control variable speed reversing switch
Inventor:
Nicholas R. Palumbo
Patented Case
View Patent ↗
Granted: Jan 16, 1990
Filed: Sep 1, 1988
Inventor
Nicholas R. Palumbo
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.