Robert E. Frey

📍 Excelsior, MN: #5 of 16 inventorsTop 35%

🗺 Minnesota: #407 of 2,022 inventorsTop 25%

Overall (1989): #63,486 of 140,708Top 50%

Patents 1989

Issued Patents 1989

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
4880530	Self-cleaning screening device	—	1989-11-14