Pertti Kokkonen

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Kempele, FI

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Patents Grantslast 30 patents

Information Patent Grant
Method of producing cement or concrete
- Patent number 4,985,081
- Issue date Jan 15, 1991
- Oy Iampella AB
- Heikki Ahonen
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES