JD

John Duff

📍 Rocklin, CA: #5 of 21 inventorsTop 25%
🗺 California: #8,284 of 26,763 inventorsTop 35%
Overall (2002): #189,154 of 266,432Top 75%
1
Patents 2002

Issued Patents 2002

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
6347600 Portable indicating and protective structure for underground utilities — 2002-02-19