CPC Subgroup Additional Only
F05C 2203/0865 Oxide ceramics
Full Title
Non-metallic inorganic materials > Ceramics; Oxides > Oxide ceramics
6 direct subcodes
Child Classifications
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- F05C 2203/0869 Aluminium oxide
- F05C 2203/0878 Aluminium titanate
- F05C 2203/0882 Carbon, e.g. graphite
- F05C 2203/0886 Silica
- F05C 2203/0891 Zinc oxide
- F05C 2203/0895 Zirconium oxide
Top Applicants
Top 10 applicants by patent filingsfor class F05, 2013–2023, worldwide · Source: EPO PATSTAT
- GE (GENERAL ELECTRIC COMPANY) US 12,002
- UNITED TECHNOLOGIES CORPORATION (UTC) US 8,736
- SAFRAN AIRCRAFT ENGINES FR 6,804
- RAYTHEON TECHNOLOGIES CORPORATION US 4,530
- SIEMENS DE 4,371
- GE (GENERAL ELECTRIC COMPANY) 3,686
- ROLLS-ROYCE GB 3,594
- PRATT & WHITNEY CANADA CORPORATION CA 3,415
- VESTAS DK 3,076
- WOBBEN PROPERTIES DE 2,614