Hristo G. Penchev

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Sofia, BG

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus for nitriding metal materials and ferroalloys under pressure
- Patent number 4,253,868
- Issue date Mar 3, 1981
- Institute po Metaloznanie i Technologia na Metalite
- Ivan D. Nikolov
- B22 - CASTING POWDER METALLURGY