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DG Didier Engineering Gmbh: 1 patents #36 of 71Top 55%
Overall (All Time): #4,093,668 of 4,157,543Top 100%
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Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4280033 Process and apparatus for the thermal treatment of coal Dietrich Wagener, Hayri Ergun 1981-07-21