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John M. Sprainis

📍 Springfield, OR: #4 of 17 inventorsTop 25%
🗺 Oregon: #1,921 of 4,557 inventorsTop 45%
Overall (2020): #406,620 of 565,922Top 75%
1
Patents 2020

Issued Patents 2020

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
10663252 Shoulder-fired firearm primary and secondary recoil attenuator Ronald J. Sprainis 2020-05-26