Granted Patent
Utility
US 4,401,972 · App. 06/273,064
Stop-light monitor device
Inventor:
Peter J. Lupoli
Patented Case
View Patent ↗
Granted: Aug 30, 1983
Filed: Jun 15, 1981
Inventor
Peter J. Lupoli
Assignee (at issue)
Sun Chemical 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.