Duncan Johnson

📍 Anoka, MN: #5 of 17 inventorsTop 30%

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

Overall (1989): #118,667 of 140,708Top 85%

Patents 1989

Issued Patents 1989

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
D300962	Nasal breathing piece	—	1989-05-02