CPC Main Group
C03C 13/00 Fibre or filament compositions (manufacture of fibres or filaments C03B37/00)
7 direct subcodes
Child Classifications
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- C03C 13/04 Fibre optics, e.g. core and clad fibre compositions (light guides G02B6/00)
- C03C 13/06 Mineral fibres, e.g. slag wool, mineral wool, rock wool