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John J. Steffen

AI Amsted Industries Incorporated: 2 patents #1 of 21Top 5%
📍 Darien, IL: #4 of 27 inventorsTop 15%
🗺 Illinois: #618 of 5,836 inventorsTop 15%
Overall (2002): #57,524 of 266,432Top 25%
2
Patents 2002

Issued Patents 2002

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
6446820 Railcar draft gear assembly and system Ronald E. Barker, Charles E. Burkhart, Marlin E. Clark, John F. Deppen, V. Terrey Hawthorne +3 more 2002-09-10
6360906 Slackless railway coupler with buff/draft gear Horst T. Kaufhold 2002-03-26