JB

John F. Bortnik

EC Elkem Metals Company: 1 patents #1 of 4Top 25%
📍 Ashtabula, OH: #3 of 11 inventorsTop 30%
🗺 Ohio: #715 of 3,574 inventorsTop 25%
Overall (1989): #96,467 of 140,708Top 70%
1
Patents 1989

Issued Patents 1989

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4816230 System for recycling fines to hollow electrode Donald A. Clayman, Scott A. Baker 1989-03-28