DR

Douglas A. Rio

📍 Fairfield, IL: #34 of 58 inventorsTop 60%
🗺 Illinois: #48,934 of 84,256 inventorsTop 60%
Overall (All Time): #3,744,653 of 4,157,543Top 95%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
5524291 Sun visor for eye glasses Charles E. Lab 1996-06-11