RR

Robert J. Race

KS Keystone Retaining Wall Systems: 2 patents #2 of 3Top 70%
📍 Eagan, MN: #6 of 77 inventorsTop 8%
🗺 Minnesota: #442 of 4,231 inventorsTop 15%
Overall (2005): #36,982 of 245,428Top 20%
2
Patents 2005

Issued Patents 2005

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
6912823 Multi-channel retaining wall block and system Robert A. MacDonald 2005-07-05
6854231 Multi-channel retaining wall block and system Robert A. MacDonald 2005-02-15