Ian Preston

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Johannesburg, ZA

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Patents Grantslast 30 patents

Information Patent Grant
Vermiculite products produced by exfoliation pulverization and calc...
- Patent number 3,953,357
- Issue date Apr 27, 1976
- Mandoval Vermiculite (Proprietary) Limited
- Ian Preston
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES