Inventor
WILHELM LUDWIG
DE6 patents
Patents
6 patentsUS5163562ANov 17, 1992
Process for reclaiming bentonite and carbon particles from used foundry sand
FISCHER AG GEORG25 citations90
US4900375AFeb 13, 1990
Magnesium-treated, decarburizingly-annealed cast iron material
FISCHER AG GEORG9 citations68
US5114474AMay 19, 1992
Arrangement and method for introducing waste material into a molten slag
FISCHER AG GEORG4 citations61
US5115985AMay 26, 1992
Method for the regenerative treatment of mainly clay-bound foundry old sand
FISCHER AG GEORG2 citations59
US5091624AFeb 25, 1992
Method of flash butt welding high-carbon material, in particular nodular cast iron
FISCHER AG GEORG5 citations55
US5103894AApr 14, 1992
Process for the treatment of clay-bonded used casting sand
FISCHER AG GEORG0 citations48