DR

Dirk D. Ringgenberg

📍 Madrid, IA: #10 of 28 inventorsTop 40%
🗺 Iowa: #6,094 of 15,303 inventorsTop 40%
Overall (All Time): #1,981,454 of 4,157,543Top 50%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
10458747 Apparatus for prevention of dropping of handgun 2019-10-29
9651336 Apparatus for prevention of dropping of handgun Kenneth A. Anderson 2017-05-16