Frank Hengerer

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Schwebheim, DE

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Patents Grantslast 30 patents

Information Patent Grant
Process for the production of hardened parts of steel
- Patent number 6,306,230
- Issue date Oct 23, 2001
- SKF GmbH
- Frank Hengerer
- C21 - METALLURGY OF IRON
Information Patent Grant
Steel for ball and roller bearings
- Patent number 5,261,975
- Issue date Nov 16, 1993
- AB SKF
- Per-Olof Sorstrom
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Process for case-hardening rolling bearing elements of low-alloy ni...
- Patent number 4,913,749
- Issue date Apr 3, 1990
- SKF GmbH
- Frank Hengerer
- C21 - METALLURGY OF IRON