LJ

Leroy Sheldon Johnson

📍 Duluth, MN: #165 of 317 inventorsTop 55%
🗺 Minnesota: #32,449 of 52,454 inventorsTop 65%
Overall (All Time): #2,892,367 of 4,157,543Top 70%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

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