Granted Patent
Utility
US 6,632,044 · App. 10/146,434
Method for interconnecting a plurality of roadway barrier modules and controlling movement thereof
Inventor:
John W. Duckett
Patented Case
View Patent ↗
Granted: Oct 14, 2003
Filed: May 14, 2002
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.