RL

Ralph D. Lewis

📍 Buchanan, MI: #24 of 62 inventorsTop 40%
🗺 Michigan: #49,615 of 86,293 inventorsTop 60%
Overall (All Time): #3,883,692 of 4,157,543Top 95%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
5042473 Demand valve for a respirator — 1991-08-27