JD

John Duff

JM Joy Manufacturing: 2 patents #1 of 23Top 5%
📍 Rocklin, CA: #1 of 4 inventorsTop 25%
🗺 California: #320 of 6,198 inventorsTop 6%
Overall (1982): #11,945 of 81,411Top 15%
2
Patents 1982

Issued Patents 1982

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4363258 Hydraulic impactor — 1982-12-14
4344353 Hammer Peter McFarlane 1982-08-17