CPC Subgroup Additional Only
C03B 2203/10 Internal structure or shape details
Full Title
Fibre product details, e.g. structure, shape > Internal structure or shape details
4 direct subcodes
Child Classifications
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- C03B 2203/12 Non-circular or non-elliptical cross-section, e.g. planar core
- C03B 2203/14 Non-solid, i.e. hollow products, e.g. hollow clad or with core-clad interface
- C03B 2203/18 Axial perturbations, e.g. in refractive index or composition
- C03B 2203/22 Radial profile of refractive index, composition or softening point
Top Applicants
Top 10 applicants by patent filingsfor class C03, 2013–2023, worldwide · Source: EPO PATSTAT
- CORNING US 9,559
- SAINT-GOBAIN GLASS FR 3,824
- NIPPON ELECTRIC GLASS COMPANY JP 2,792
- SCHOTT DE 2,029
- AGC JP 1,938
- ASAHI GLASS COMPANY JP 1,679
- CORNING 1,650
- NIPPON ELECTRIC GLASS COMPANY 1,501
- A G C 1,049
- O-I (OWENS-ILLINOIS) US 1,027