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Helmut Riegel

📍 Gelsenkirchen, DE: #95 of 201 inventorsTop 50%
Overall (All Time): #3,911,046 of 4,157,543Top 95%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4955331 Process for the operation of an Otto engine Dieter Hohr, August-Wilhelm Preuss, Kurt-Peter Schug 1990-09-11