DIFF Main Group
F28D 21/00 Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
Introduced: September 1968
Title
Titles differ between systems:
IPC: Heat-exchange apparatus not covered by any of the groups
CPC: Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
Full Title
Full titles differ between systems:
IPC:
Heat-exchange apparatus not covered by any of the groups
CPC:
Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
Of 4 combined children, 0 exist in both systems.
4 codes are CPC-only extensions.
Note: 1 CPC extensions are marked as secondary classification only.
Child Classifications
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Top Applicants
Top Applicants (IPC)
Class F28,2013–2023, worldwide · Source: EPO PATSTAT
- VALEO SYSTEMES THERMIQUES FR 1,902
- MITSUBISHI ELECTRIC CORPORATION JP 1,327
- GREE ELECTRIC APPLIANCES 1,152
- MAHLE INTERNATIONAL DE 999
- ALFA LAVAL SE 960
- HANON SYSTEMS KR 917
- DENSO CORPORATION 905
- DENSO CORPORATION JP 802
- CHINESE ACADEMY OF SCIENCES 787
- XIAN THERMAL POWER RESEARCH INSTITUTE COMPANY 762
Top Applicants (CPC)
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