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John J. Steffen

AI Amsted Industries Incorporated: 1 patents #4 of 17Top 25%
📍 Darien, IL: #5 of 12 inventorsTop 45%
🗺 Illinois: #1,021 of 4,484 inventorsTop 25%
Overall (1994): #111,383 of 165,921Top 70%
1
Patents 1994

Issued Patents 1994

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
5312007 Slackless railway coupler with draft/buff gear Horst T. Kaufhold, David John Jarvis, David Greg Anderson, Ronald G. Butler 1994-05-17