Granted Patent
Utility
US 4,901,704 · App. 07/191,876
Hall effect device ignition and charging system
Inventor:
Edward J. Safranek
Patented Case
View Patent ↗
Granted: Feb 20, 1990
Filed: May 9, 1988
Inventor
Edward J. Safranek
Assignee (at issue)
F & B Mfg. Co.
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.