Enn Vallak

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Geneva, CH

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Patents Grantslast 30 patents

Information Patent Grant
Method of sizing a hot top liner and assembling a hot top
- Patent number 4,785,869
- Issue date Nov 22, 1988
- Re-Top USA, Inc.
- Charles B. Childs
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Lightweight reusable hot top
- Patent number 4,721,278
- Issue date Jan 26, 1988
- Re-Top USA, Inc.
- Enn Vallak
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Ingot mould having a hot-top inside the upper part of the mould
- Patent number 4,515,341
- Issue date May 7, 1985
- International Ferrox Co., Establishment
- Enn Vallak
- B22 - CASTING POWDER METALLURGY