LJ

Leroy Sheldon Johnson

📍 Duluth, MN: #10 of 29 inventorsTop 35%
🗺 Minnesota: #2,481 of 6,792 inventorsTop 40%
Overall (2018): #331,678 of 503,207Top 70%
1
Patents 2018

Issued Patents 2018

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
9986320 Portable guitar amplifier Kenneth Gustave Roebke, Rodney Dwaine Koivisto 2018-05-29