DB

Douglas Mark Bown

📍 Johnston, IA: #174 of 247 inventorsTop 75%
🗺 Iowa: #8,735 of 15,303 inventorsTop 60%
Overall (All Time): #2,885,745 of 4,157,543Top 70%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
9947237 Electronic push-button contrabass trainer — 2018-04-17