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 grant trajectory.

12,158
US patents granted
#1/4
in F25
49.8%
F25 class share
+19%
5-yr velocity

The verdict

According to USPTO PatentsView, Refrigeration Machines ranks #153 of 670 CPC technology areas - 12,158 US patents granted since 2015, with recorded grant volume up 19% over five years.

#153
of 670 CPC technology areas
12,158
US patents granted, 2015–2025
Mitsubishi Electric
leading assignee (953)
+19%
grant velocity, last 5 yrs

How F25B's grant cadence moved

Between 2020–2024, F25B recorded 5,879 grants versus 4,952 in 2015–2019 (+19% equal-window velocity). Across complete years, output peaked in 2019 at 1,368 grants and bottomed in 2015 at 604 (+126% peak-over-trough). Lead assignee Mitsubishi Electric Corporation holds 7.8% of the class ; the top three share 18.3%.

Leaderboard read

F25B concentration, lead at 7.8%

Mitsubishi Electric Corporation leads this historical grant record at 7.8% of F25B - foreign corporation assignees hold 57% of class grants (4,749 of 8,318). Figures describe granted US utility patents in this CPC subclass, not current investment or legal strength.

Leader's share
7.8%

953 of 12,158 grants

Top three share
18.3%

of the class's recorded grants

Lead over #2
274

more grants than LG Electronics Inc.

Where F25B sits inside F25

Among 4 subclasses in F25 (Refrigeration OR COOLING; Combined Heating AND Refrigeration SYSTEMS; Heat Pump SYSTEMS; Manufacture OR Storage OF ICE; Liquefaction Solidification OF Gases), F25B ranks #1 and holds 49.8% of the parent class's 24,410 recorded grants. Sibling chips below are the other subclasses in the same parent class, not the nationwide volume/lead-share peers further down.

F25D 8,866 F25J 1,732 F25C 1,654

Rising assignees active in F25B

Company-wide grant multiples (2022–2024 vs 2019–2021) among assignees with ≥5 patents in this subclass. Growth is company-wide; class patent counts are subclass-specific.

  1. #1 Copeland LP 47x 0 → 47 company-wide · 29 in F25B
  2. #2 Qingdao Haier Refrigerator Co., Ltd. 32x 2 → 63 company-wide · 6 in F25B
  3. #3 Zhejiang Dunan Artificial Environment Co., Ltd. 23x 0 → 23 company-wide · 21 in F25B
  4. #4 FFI Ionix IP, Inc. 23x 0 → 23 company-wide · 8 in F25B
  5. #5 Goodman Manufacturing Company, L.P. 22x 1 → 22 company-wide · 9 in F25B

F25B grants by year, peak 2019 (1,368)

US utility-patent grants per year in F25B, 2015–2025 - recent five years are up 19% 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

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). 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…Haier Us Appliance…Sumitomo Heavy…Heatcraft Refrigeratio…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).

Classes near F25B's 12,158-grant footprint

Nationwide nearest neighbors for F25B (#153 of 670 by volume ; lead share 7.8%) - not the F25 parent-class siblings above.

Nearest by grant volume

F01N 12,144 B05B 12,186 G09B 12,324 C01P 12,347

Nearest by lead-assignee share

G03B 7.8% E03B 7.9% H04S 7.9% B60L 7.8%

Questions about F25B

Which company holds the most patents in F25B?
Mitsubishi Electric Corporation leads F25B with 953 patents (7.8% of the subclass). By PatentsView assignee type, foreign corporations account for 57% of class grants.
Which F25B assignees grew fastest recently?
Among assignees with ≥5 grants in F25B, Copeland LP shows the highest company-wide grant multiple (47x: 0 grants in 2019–2021 → 47 in 2022–2024) while holding 29 patents in this subclass. Growth is company-wide, not class-only.
How does F25B compare inside parent class F25?
Inside F25 (Refrigeration OR COOLING; Combined Heating AND Refrigeration SYSTEMS; Heat Pump SYSTEMS; Manufacture OR Storage OF ICE; Liquefaction Solidification OF Gases), F25B ranks #1 of 4 subclasses by grant volume and holds 49.8% of the parent class total. The largest sibling is F25D (8,866 grants).

What to do with this data

F25B in context - here's where to go next.

  • Mitsubishi Electric Corporation leads F25B with 953 grants in this class. See full portfolio
  • F25B ranks #153 of 670 by grant volume among all tracked CPC technology areas. See the ranking
  • Inside parent class F25, the largest sibling subclass is F25D with 8,866 grants. Explore F25D

Figures reflect USPTO PatentsView grant data through 2026-05-15; pending applications not yet granted are not counted.

Methodology - F25B figures are USPTO PatentsView granted-utility totals for this subclass (12,158 grants in the tracked window).

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.