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Joachim Schwerdtfeger

HG Hamburger Stahlwerke Gmbh: 1 patents #7 of 17Top 45%
📍 Barum, DE: #3 of 4 inventorsTop 75%
Overall (All Time): #4,097,177 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4290800 Process for feeding iron sponge into an electric arc furnace Siegfried Sensis, Klaus Walden, Dieter Ameling 1981-09-22