PlainPatent

CPC technology class · Y02

Y02E - Reduction OF Greenhouse GAS [GHG] Emissions

Reduction of greenhouse gas [ghg] emissions, related to energy generation, transmission or distribution. 125,003 US utility patents granted 2015–2025, with the leading assignees and year-by-year filing trajectory.

125,003
US patents granted
Y02
Parent CPC class
20
Active assignees
+21%
5-yr velocity

The verdict

Reduction OF Greenhouse GAS [GHG] Emissions ranks #11 of 670 CPC technology areas - 125,003 US patents granted since 2015, with filing up 21% over five years.

#11
of 670 CPC technology areas
125,003
US patents granted, 2015–2025
Samsung
leading assignee (6,395)
+21%
filing velocity, last 5 yrs
Top assignee: Samsung Electronics Co., Ltd. (6,395 patents)

CPC subclass Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION - covers 125,003 US utility patents granted between 2015 and 2025 according to USPTO PatentsView records, within the broader CPC class Y02 (TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE). See our CPC classification guide for how the system works.

The competitive landscape in Y02E is shaped by 20 distinct companies actively filing in this space. Samsung Electronics Co., Ltd. leads with 6,395 patents, followed by Toyota Jidosha Kabushiki Kaisha at 3,460 grants and LG CHEM, Ltd. at 2,639.

Filing activity in Y02E is up 21% 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 Y02E innovation accelerating?

US utility-patent grants per year in Y02E, 2015–2025 - recent five years are up 21% versus 2015–2019.

8,0009,00010,00011,00012,000 20152016201720182019202020212022202320242025 8,217

Who leads Y02E?

The 12 most active assignees in REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION - wider bars mean more grants

patents

What this shows Samsung is the most active filer in Y02E, holding 6,395 of the 125,003 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 Y02E
Rank Company Patents in Y02E
#1 Samsung Electronics Co., Ltd. 6,395
#2 Toyota Jidosha Kabushiki Kaisha 3,460
#3 LG CHEM, Ltd. 2,639
#4 LG Energy Solution, Ltd. 2,060
#5 Panasonic Intellectual Property Management Co., Ltd. 1,752
#6 General Electric Company 1,650
#7 Hyundai Motor Company 1,589
#8 Honda Motor Co., Ltd. 1,355
#9 Robert Bosch Gmbh 1,154
#10 Vestas Wind Systems A/s 1,070
#11 GM Global Technology Operations Llc 1,056
#12 Semiconductor Energy Laboratory Co., Ltd. 1,004
#13 Kabushiki Kaisha Toshiba 926
#14 Ford Global Technologies, Llc 868
#15 Contemporary Amperex Technology Co., Limited 833
#16 KIA Motors Corporation 813
#17 Commissariat A L'energie Atomique ET AUX Energies Alternatives 695
#18 Siemens Aktiengesellschaft 683
#19 Nissan Motor Co., Ltd. 671
#20 Mitsubishi Electric Corporation 625

About This Class

CPC subclass Y02E belongs to class Y02.

125,003 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 Y02E 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 Y02E assignees by class footprint. Bubble size = patents in Y02E. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Top 14 Y02E assignees by class footprint. Bubble size = patents in Y02E. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 14 data points (bubble-sized by third dimension). 5101520 02000400060008000 Patents in Y02E Avg claims / patent (company-wide) SamsungToyota JidoshaLg ChemLg Energy SolutionPanasonic Intellectua…General ElectricHyundai MotorHonda MotorRobert BoschVestas Wind Systems A…Gm Global Technology…Semiconductor Energy…ToshibaFord Global
Top 14 Y02E assignees by class footprint. Bubble size = patents in Y02E. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Frequently Asked Questions

What is CPC class Y02E?
CPC subclass Y02E covers REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION. It belongs to CPC class Y02 (TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE), with 125,003 US utility patents granted since 2015.
How many patents have been filed in Y02E?
125,003 US utility patents were granted in CPC subclass Y02E between 2015 and 2025, based on USPTO PatentsView data.
Which company holds the most patents in Y02E?
Samsung Electronics Co., Ltd. leads Y02E with 6,395 patents, making it the most active assignee in this technology area.
How is patent data for Y02E 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., Y02) is a broad technology category. Subclasses like Y02E 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.