John M. Campbell

📍 Edmonds, WA: #6 of 22 inventorsTop 30%

🗺 Washington: #241 of 1,406 inventorsTop 20%

Overall (1989): #96,274 of 140,708Top 70%

Patents 1989

Issued Patents 1989

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
4819956	Convertible sidecar/trailer	—	1989-04-11