DB

David R. Barnwell

📍 Rochester Hills, MI: #1,048 of 1,754 inventorsTop 60%
🗺 Michigan: #49,615 of 86,293 inventorsTop 60%
Overall (All Time): #3,910,104 of 4,157,543Top 95%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4951809 Conveyor construction David Boothe 1990-08-28