Granted Patent
Utility
US 6,019,550 · App. 09/147,283
Modular block retaining wall construction
Inventors:
Nigel Edwin Wrigley, Michael J. Dobie
Patented Case
View Patent ↗
Granted: Feb 1, 2000
Filed: Feb 3, 1999
Inventors
Nigel Edwin Wrigley
Michael J. Dobie
Assignee (at issue)
Nelton Limited
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.