RF

Ronald J. Fredricks

📍 Jenison, MI: #5 of 13 inventorsTop 40%
🗺 Michigan: #3,395 of 9,817 inventorsTop 35%
Overall (2018): #261,123 of 503,207Top 55%
1
Patents 2018

Issued Patents 2018

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
10145243 Planetary rotary engine with rotary ring valves William B. Ribbens 2018-12-04