CPC Main Group
F28F 21/00 Constructions of heat-exchange apparatus characterised by the selection of particular materials
6 direct subcodes
Child Classifications
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- F28F 21/02 of carbon, e.g. graphite
- F28F 21/04 of ceramic; of concrete; of natural stone
- F28F 21/06 of plastics material
- F28F 21/08 of metal
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