CPC Main Group
F28F 1/00 Tubular elements; Assemblies of tubular elements (specially adapted for movement F28F5/00)
5 direct subcodes
Child Classifications
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- F28F 1/02 Tubular elements of cross-section which is non-circular (F28F1/08, F28F1/10 take precedence)
- F28F 1/08 Tubular elements crimped or corrugated in longitudinal section
- F28F 1/10 Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses (crimped or corrugated elements F28F1/06, F28F1/08)
Top Applicants
Top 10 applicants by patent filingsfor class F28, 2013–2023, worldwide · Source: EPO PATSTAT
- VALEO SYSTEMES THERMIQUES FR 1,945
- MITSUBISHI ELECTRIC CORPORATION JP 1,518
- MAHLE INTERNATIONAL DE 1,120
- ALFA LAVAL SE 1,085
- HANON SYSTEMS KR 939
- DENSO CORPORATION JP 900
- LG ELECTRONICS KR 861
- HAMILTON SUNDSTRAND US 795
- DAIKIN INDUSTRIES JP 608
- DENSO CORPORATION 537