Granted Patent
Utility
US 5,321,439 · App. 07/960,692
Vehicle headlight testing system
Inventor:
John Rogers
Patented Case
View Patent ↗
Granted: Jun 14, 1994
Filed: Oct 14, 1992
Inventor
John Rogers
Assignee (at issue)
Environmental Systems Products Holdings Inc.
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.