DJ

Douglas Marshall Johnson

📍 Souderton, PA: #4 of 13 inventorsTop 35%
🗺 Pennsylvania: #2,519 of 7,891 inventorsTop 35%
Overall (2019): #483,421 of 560,194Top 90%
1
Patents 2019

Issued Patents 2019

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
10217449 Percussive beater with transducer Andrew Gearhart 2019-02-26