PlainPatent

CPC technology class · F25

F25B - Refrigeration Machines

Refrigeration machines, plants or systems; combined heating and refrigeration systems; heat pump systems. 12,158 US utility patents granted 2015–2025, with the leading assignees and year-by-year filing trajectory.

12,158
US patents granted
F25
Parent CPC class
20
Active assignees
+35%
5-yr velocity

The verdict

Refrigeration Machines ranks #153 of 670 CPC technology areas - 12,158 US patents granted since 2015, with filing up 35% over five years.

#153
of 670 CPC technology areas
12,158
US patents granted, 2015–2025
Mitsubishi Electric
leading assignee (953)
+35%
filing velocity, last 5 yrs
Top assignee: Mitsubishi Electric Corporation (953 patents)

CPC subclass F25B - REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS - covers 12,158 US utility patents granted between 2015 and 2025 according to USPTO PatentsView records, within the broader CPC class F25 (REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES). See our CPC classification guide for how the system works.

The competitive landscape in F25B is shaped by 20 distinct companies actively filing in this space. Mitsubishi Electric Corporation leads with 953 patents, followed by LG Electronics Inc. at 679 grants and Daikin Industries, Ltd. at 598.

Filing activity in F25B is up 35% over the past five years versus 2015-2019, a sharp acceleration suggesting an emerging or fast-moving technology area. All counts come directly from USPTO PatentsView and reflect US granted utility patents only.

Is F25B innovation accelerating?

US utility-patent grants per year in F25B, 2015–2025 - recent five years are up 35% versus 2015–2019.

4006008001,0001,2001,4001,600 20152016201720182019202020212022202320242025 826

Who leads F25B?

The 12 most active assignees in REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS - wider bars mean more grants

patents

What this shows Mitsubishi Electric is the most active filer in F25B, holding 953 of the 12,158 patents in this class. Concentration at the top signals how contestable this technology area is for new entrants.

Source USPTO PatentsView, granted utility patents As of 2015–2025 grant years
View data table
Top patent holders in CPC subclass F25B
Rank Company Patents in F25B
#1 Mitsubishi Electric Corporation 953
#2 LG Electronics Inc. 679
#3 Daikin Industries, Ltd. 598
#4 Carrier Corporation 517
#5 Trane International Inc. 264
#6 Lennox Industries Inc. 244
#7 Whirlpool Corporation 201
#8 Emerson Climate Technologies, Inc. 173
#9 Johnson Controls Technology Company 159
#10 Haier US Appliance Solutions, Inc. 134
#11 Sumitomo Heavy Industries, Ltd. 123
#12 Heatcraft Refrigeration Products Llc 115
#13 Danfoss A/s 114
#14 Hanon Systems 105
#15 Mahle International Gmbh 86
#16 Thermo KING Llc 83
#17 THE Chemours Company FC, Llc 79
#18 Rheem Manufacturing Company 68
#19 Johnson Controls Tyco IP Holdings LLP 67
#20 Hill Phoenix, Inc. 66

About This Class

CPC subclass F25B belongs to class F25.

12,158 patents were granted in this class between 2015 and 2025.

20 companies actively patent in this space.

Classification System

Cooperative Patent Classification (CPC) is a hierarchical patent classification system used by the USPTO and EPO.

← All Technology Classes Technology Rankings →

Footprint here vs. claim strategy

Each dot is a leading F25B assignee, placed by how many patents it holds in this class (horizontal) against its company-wide average claims per patent (vertical) - a read on whether the class is led by broad-but-shallow filers or focused deep-claim players.

Top 14 F25B assignees by class footprint. Bubble size = patents in F25B. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Top 14 F25B assignees by class footprint. Bubble size = patents in F25B. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 14 data points (bubble-sized by third dimension). 5101520 02004006008001000 Patents in F25B Avg claims / patent (company-wide) Mitsubishi ElectricLgDaikin IndustriesCarrierTrane InternationalLennox IndustriesWhirlpoolEmerson ClimateJohnson Controls Tech…Haier Us Appliance So…Sumitomo Heavy Indust…Heatcraft Refrigerati…Danfoss A/SHanon Systems
Top 14 F25B assignees by class footprint. Bubble size = patents in F25B. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Frequently Asked Questions

What is CPC class F25B?
CPC subclass F25B covers REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS. It belongs to CPC class F25 (REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES), with 12,158 US utility patents granted since 2015.
How many patents have been filed in F25B?
12,158 US utility patents were granted in CPC subclass F25B between 2015 and 2025, based on USPTO PatentsView data.
Which company holds the most patents in F25B?
Mitsubishi Electric Corporation leads F25B with 953 patents, making it the most active assignee in this technology area.
How is patent data for F25B collected?
Patent data comes from USPTO PatentsView, a public research dataset maintained by the United States Patent and Trademark Office. It covers all US granted utility patents and assigns CPC codes based on the technology described in each patent.
What is the difference between CPC class and subclass?
A CPC class (e.g., F25) is a broad technology category. Subclasses like F25B provide finer granularity within that category. PlainPatent organizes data at the subclass level (4-character codes) for the most useful view of technology domains.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from USPTO PatentsView - official U.S. government patent data. See our methodology for computation details. Retrieved and formatted by PlainPatent Editorial

Every figure on PlainPatent is rendered directly from USPTO source data, no number is typed in by an editor. This page draws directly on USPTO source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.