CPC Subgroup Additional Only
C03B 2205/12 Drawing solid optical fibre directly from a hollow preform
Full Title
Fibre drawing or extruding details > Drawing solid optical fibre directly from a hollow preform
3 direct subcodes
Child Classifications
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- C03B 2205/13 from a hollow glass tube containing glass-forming material in particulate form, e.g. to form the core by melting the powder during drawing
- C03B 2205/14 comprising collapse of an outer tube onto an inner central solid preform rod
- C03B 2205/16 the drawn fibre consisting of circularly symmetric core and clad
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