CPC Subgroup
C03B 23/207 Uniting glass rods, glass tubes, or hollow glassware (C03B23/24 takes precedence)
Full Title
Re-forming shaped glass (re-forming fibres or filaments C03B37/14) > Uniting glass pieces by fusing without substantial reshaping > Uniting glass rods, glass tubes, or hollow glassware (C03B23/24 takes precedence)
2 direct subcodes
Child Classifications
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- C03B 23/213 Joining projections or feet
- C03B 23/217 for the production of cathode ray tubes or similarly shaped tubes
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