Granted Patent
Utility
US 5,387,049 · App. 08/084,002
Roadway barrier module, system and method
Inventor:
John W. Duckett
Patented Case
View Patent ↗
Granted: Feb 7, 1995
Filed: Jun 29, 1993
Inventor
John W. Duckett
Assignee (at issue)
Barrier Systems, 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.