AP

Arnold Pfeiffer

MA Mannesmann Ag: 1 patents #514 of 1,341Top 40%
Overall (All Time): #4,020,927 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
4539042 Preventing an increase of the nitrogen content in molten steel Hans Gruner, Heinrich-Wilhelm Rommerswinkel, Rolf Vest 1985-09-03