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 grant trajectory.

125,003
US patents granted
#1/8
in Y02
31.3%
Y02 class share
+5%
5-yr velocity

The verdict

According to USPTO PatentsView, Reduction Of Greenhouse Gas [Ghg] Emissions ranks #11 of 670 CPC technology areas - 125,003 US patents granted since 2015, with recorded grant volume up 5% over five years.

#11
of 670 CPC technology areas
125,003
US patents granted, 2015–2025
Samsung
leading assignee (6,395)
+5%
grant velocity, last 5 yrs

How Y02E's grant cadence moved

Between 2020–2024, Y02E recorded 54,939 grants versus 52,260 in 2015–2019 (+5% equal-window velocity). Across complete years, output peaked in 2020 at 11,817 grants and bottomed in 2015 at 9,740 (+21% peak-over-trough). Lead assignee Samsung Electronics Co., Ltd. holds 5.1% of the class ; the top three share 10.0%.

Leaderboard read

Y02E concentration, lead at 5.1%

Samsung Electronics Co., Ltd. leads this historical grant record at 5.1% of Y02E - foreign corporation assignees hold 70% of class grants (74,586 of 105,931). Figures describe granted US utility patents in this CPC subclass, not current investment or legal strength.

Leader's share
5.1%

6,395 of 125,003 grants

Top three share
10.0%

of the class's recorded grants

Lead over #2
2,935

more grants than Toyota Jidosha Kabushiki Kaisha

Where Y02E sits inside Y02

Among 8 subclasses in Y02 (Technologies OR Applications FOR Mitigation OR Adaptation Against Climate Change), Y02E ranks #1 and holds 31.3% of the parent class's 399,122 recorded grants. Sibling chips below are the other subclasses in the same parent class, not the nationwide volume/lead-share peers further down.

Y02T 81,138 Y02P 65,929 Y02D 45,676 Y02B 34,811 Y02A 32,476 Y02W 9,860 Y02C 4,229

Rising assignees active in Y02E

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 LG Energy Solution, Ltd. 770x 2 → 1,539 company-wide · 2,060 in Y02E
  2. #2 Exxon Mobil Technology and Engineering Company 298x 0 → 298 company-wide · 37 in Y02E
  3. #3 Shenzhen Shokz Co., Ltd. 288x 0 → 288 company-wide · 13 in Y02E
  4. #4 Huawei Digital Power Technologies Co., Ltd. 245x 0 → 245 company-wide · 108 in Y02E
  5. #5 SK On Co., Ltd. 243x 0 → 243 company-wide · 331 in Y02E

Y02E grants by year, peak 2020 (11,817)

US utility-patent grants per year in Y02E, 2015–2025 - recent five years are up 5% 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

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). 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 Intellectual…General ElectricHyundai MotorHonda MotorRobert BoschVestas Wind Systems…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).

Classes near Y02E's 125,003-grant footprint

Nationwide nearest neighbors for Y02E (#11 of 670 by volume ; lead share 5.1%) - not the Y02 parent-class siblings above.

Nearest by grant volume

A61P 125,535 G06T 131,672 G01N 115,972 G02B 115,576

Nearest by lead-assignee share

H01P 5.1% H02P 5.1% H10F 5.2% B63C 5.1%

Questions about Y02E

Which company holds the most patents in Y02E?
Samsung Electronics Co., Ltd. leads Y02E with 6,395 patents (5.1% of the subclass). By PatentsView assignee type, foreign corporations account for 70% of class grants.
Which Y02E assignees grew fastest recently?
Among assignees with ≥5 grants in Y02E, LG Energy Solution, Ltd. shows the highest company-wide grant multiple (770x: 2 grants in 2019–2021 → 1,539 in 2022–2024) while holding 2,060 patents in this subclass. Growth is company-wide, not class-only.
How does Y02E compare inside parent class Y02?
Inside Y02 (Technologies OR Applications FOR Mitigation OR Adaptation Against Climate Change), Y02E ranks #1 of 8 subclasses by grant volume and holds 31.3% of the parent class total. The largest sibling is Y02T (81,138 grants).

What to do with this data

Y02E in context - here's where to go next.

  • Samsung Electronics Co., Ltd. leads Y02E with 6,395 grants in this class. See full portfolio
  • Y02E ranks #11 of 670 by grant volume among all tracked CPC technology areas. See the ranking
  • Inside parent class Y02, the largest sibling subclass is Y02T with 81,138 grants. Explore Y02T

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

Methodology - Y02E figures are USPTO PatentsView granted-utility totals for this subclass (125,003 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.