RD

Robert Rudolf Duin

📍 Valley Center, CA: #52 of 119 inventorsTop 45%
🗺 California: #185,134 of 386,348 inventorsTop 50%
Overall (All Time): #2,249,627 of 4,157,543Top 55%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
5908007 Rotating livestock hay feeder 1999-06-01
5520143 Cellular livestock hay feeder 1996-05-28