Technology Topic
Heat Pump Patent Classification
Heat pumps and refrigeration share one subclass: F25B covers compression and sorption machines, refrigerant circuits and the reversible systems that heat buildings.
The electrification of heating has pushed filings here, along with the refrigerant transition to low-GWP working fluids driven by the F-gas regulations.
The classification codes that matter
F25B 178,629 filings 2013–2023
REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS;…
Refrigeration and heat pumps: compressors, circuits, refrigerants and system control.
2018 → 2023: 17,386 → 18,066 filings (+4 %)
Who files here: top applicants
- 1 HAIER SMART HOME (CN) 16,480
- 2 LG ELECTRONICS (KR) 8,561
- 3 MIDEA 7,315
- 4 GREE ELECTRIC APPLIANCES 6,041
- 5 HEFEI MIDEA REFRIGERATOR COMPANY 5,211
IPC filings 2013–2023, aggregated across the codes above. Source: EPO PATSTAT.
Not sure which code fits?
Describe your technology in plain language and get matching IPC and CPC codes: