Granted Patent
Utility
US 4,864,157 · App. 07/193,041
Reduced arcing contact switching circuit
Inventor:
John A. Dickey
Patented Case
View Patent ↗
Granted: Sep 5, 1989
Filed: May 12, 1988
Inventor
John A. Dickey
Assignee (at issue)
SpaTron Corporation
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.