Granted Patent
Utility
US 5,237,133 · App. 07/860,173
Safety ignition switch
Inventor:
Carl Frank
Patented Case
View Patent ↗
Granted: Aug 17, 1993
Filed: Mar 30, 1992
Inventor
Carl Frank
Assignee (at issue)
Joseph Pollak 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.