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William B. Ribbens

📍 Ann Arbor, MI: #327 of 929 inventorsTop 40%
🗺 Michigan: #3,395 of 9,817 inventorsTop 35%
Overall (2018): #193,576 of 503,207Top 40%
1
Patents 2018

Issued Patents 2018

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
10145243 Planetary rotary engine with rotary ring valves Ronald J. Fredricks 2018-12-04