DH

Donald A. Hadfield

📍 Pietermaritzburg, ZA: #10 of 27 inventorsTop 40%
Overall (All Time): #3,922,444 of 4,157,543Top 95%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4810219 Life saving device Malcom D. Anderson 1989-03-07