DR

Dirk D. Ringgenberg

📍 Madrid, IA: #3 of 3 inventorsTop 100%
🗺 Iowa: #543 of 1,748 inventorsTop 35%
Overall (2017): #439,365 of 506,227Top 90%
1
Patents 2017

Issued Patents 2017

Showing 1–1 of 1 patents

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