Roy D. Mattson

📍 White Bear Lake, MN: #8 of 30 inventorsTop 30%

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

Overall (1989): #62,204 of 140,708Top 45%

Patents 1989

Issued Patents 1989

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
4817872	Adjustable fluid spray gun	—	1989-04-04