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Wilhelm Heller
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Duisburg, DE
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last 30 patents
Information
Patent Grant
Rail steel
Patent number
5,711,914
Issue date
Jan 27, 1998
NMH Stahwerke GmbH
Wilhelm Heller
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Railway-track elements and method of manufacturing them
Patent number
5,482,576
Issue date
Jan 9, 1996
BWG Butzbacher Weichenbau, GmbH
Wilhelm Heller
C21 - METALLURGY OF IRON
Information
Patent Grant
Method for thermal treatment of pearlitic rail steels
Patent number
4,714,500
Issue date
Dec 22, 1987
Krupp Stahl AG
Wilhelm Heller
C21 - METALLURGY OF IRON
Information
Patent Grant
Method for reducing internal stresses of roller straightened rails
Patent number
4,659,398
Issue date
Apr 21, 1987
Krupp Stahl Aktiengesellschaft
Wilhelm Heller
C21 - METALLURGY OF IRON
Information
Patent Grant
Rail having high resistance to wear in its head and high resistance...
Patent number
4,575,397
Issue date
Mar 11, 1986
Krupp Stahl Aktiengesellschaft
Wilhelm Heller
C21 - METALLURGY OF IRON
Information
Patent Grant
Abrasion resistant rails and/or rail wheels, and process for produc...
Patent number
4,230,488
Issue date
Oct 28, 1980
Fried. Krupp Huttenwerke AG
Wilhelm Heller
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...