DB

Douglas Mark Bown

📍 Johnston, IA: #25 of 63 inventorsTop 40%
🗺 Iowa: #472 of 1,620 inventorsTop 30%
Overall (2018): #434,319 of 503,207Top 90%
1
Patents 2018

Issued Patents 2018

Showing 1–1 of 1 patents

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