Helmut Grof

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Bruchkobel, DT

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Patents Grantslast 30 patents

Information Patent Grant
Method and apparatus for the production of solid forging blocks wit...
- Patent number 4,049,039
- Issue date Sep 20, 1977
- Leybold Heraeus GmbH & Co. KG
- Helmut Theodor Grof
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
Arrangement for continuous manufacture of metal ingots in a mold wi...
- Patent number 3,938,582
- Issue date Feb 17, 1976
- Leybold Heraeus GmbH & Co. KG
- Wolfgang Schwartz-Domke
- B22 - CASTING POWDER METALLURGY