CPC technology class · Y02

Y02B - Climate Change Mitigation Technologies Related To Buildings

Climate change mitigation technologies related to buildings, e.g. housing, house appliances or related end-user applications. 34,811 US utility patents granted 2015–2025, with the leading assignees and year-by-year grant trajectory.

Compiled by PlainPatent · May 15, 2026

34,811
US patents granted: #5/8
in Y02: 8.7%
Y02 class share: -16%
5-yr velocity

The verdict

According to USPTO PatentsView, Climate Change Mitigation Technologies Related To Buildings ranks #50 of 670 CPC technology areas - 34,811 US patents granted since 2015, with recorded grant volume down 16% over five years.

#50
of 670 CPC technology areas: 34,811
US patents granted, 2015–2025: Lg
leading assignee (654): -16%
grant velocity, last 5 yrs

How Y02B's grant cadence moved

Between 2020–2024, Y02B recorded 14,659 grants versus 17,521 in 2015–2019 (-16% equal-window velocity). Across complete years, output peaked in 2019 at 3,997 grants and bottomed in 2024 at 2,423 (+65% peak-over-trough). Lead assignee LG Electronics Inc. holds 1.9% of the class ; the top three share 5.3%.

Leaderboard read

Y02B concentration, lead at 1.9%

LG Electronics Inc. leads this historical grant record at 1.9% of Y02B - foreign corporation assignees hold 54% of class grants (12,237 of 22,484). Figures describe granted US utility patents in this CPC subclass, not current investment or legal strength.

Leader's share: 1.9%
Top three share: 5.3%
Lead over #2: 28

Where Y02B sits inside Y02

Among 8 subclasses in Y02 (Technologies OR Applications FOR Mitigation OR Adaptation Against Climate Change), Y02B ranks #5 and holds 8.7% 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.

Y02E 125,003 Y02T 81,138 Y02P 65,929 Y02D 45,676 Y02A 32,476 Y02W 9,860 Y02C 4,229

Rising assignees active in Y02B

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 Huawei Digital Power Technologies Co., Ltd. 245x 0 → 245 company-wide · 54 in Y02B
#2 Hitachi Energy Ltd 120x 0 → 120 company-wide · 5 in Y02B
#3 Strong Force TX Portfolio 2018, LLC 91x 0 → 91 company-wide · 37 in Y02B
#4 Maxeon Solar Pte. Ltd. 86x 0 → 86 company-wide · 7 in Y02B
#5 Wolfspeed, Inc. 80x 2 → 159 company-wide · 6 in Y02B

Y02B grants by year, peak 2019 (3,997)

US utility-patent grants per year in Y02B, 2015–2025 - recent five years are down 16% versus 2015–2019.

Lg

654
Mitsubishi Electric

626
Panasonic Intellectual…

575
Lutron Technology

448
Signify Holding B V

406
Texas Instruments…

357
Infineon Austria

282
Whirlpool

275
Daikin Industries

254
Rohm

227
Delta

225
Philips Lighting…

225

What this shows Lg is the most active filer in Y02B, holding 654 of the 34,811 patents in this class. Concentration at the top signals how contestable this technology area is for new entrants.

View data table

Top patent holders in CPC subclass Y02B
Rank	Company	Patents in Y02B
#1	LG Electronics Inc.	654
#2	Mitsubishi Electric Corporation	626
#3	Panasonic Intellectual Property Management Co., Ltd.	575
#4	Lutron Technology Company LLC	448
#5	Signify Holding B.V.	406
#6	Texas Instruments Incorporated	357
#7	Infineon Technologies Austria AG	282
#8	Whirlpool Corporation	275
#9	Daikin Industries, Ltd.	254
#10	Rohm Co., Ltd.	227
#11	Delta Electronics, Inc.	225
#12	Philips Lighting Holding B.V.	225
#13	Semiconductor Components Industries, LLC	220
#14	Koniniklijke Philips N.V.	217
#15	Silergy Semiconductor Technology (Hangzhou) Ltd.	193
#16	ABL IP Holding LLC	191
#17	Fuji Electric Co., Ltd.	188
#18	Lennox Industries Inc.	177
#19	Johnson Controls Technology Company	176
#20	Carrier Corporation	167

Footprint here vs. claim strategy

Each dot is a leading Y02B 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 Y02B assignees by class footprint. Bubble size = patents in Y02B. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Classes near Y02B's 34,811-grant footprint

Nationwide nearest neighbors for Y02B (#50 of 670 by volume ; lead share 1.9%) - not the Y02 parent-class siblings above.

Nearest by grant volume

B60K 34,645 G10L 35,471 H01R 35,523 H02M 33,952

Nearest by lead-assignee share

C08B 1.9% C12N 1.9% E04B 1.8% C12Q 1.8%

Questions about Y02B

Which company holds the most patents in Y02B?

LG Electronics Inc. leads Y02B with 654 patents (1.9% of the subclass). By PatentsView assignee type, foreign corporations account for 54% of class grants.

Which Y02B assignees grew fastest recently?

Among assignees with ≥5 grants in Y02B, Huawei Digital Power Technologies Co., Ltd. shows the highest company-wide grant multiple (245x: 0 grants in 2019–2021 → 245 in 2022–2024) while holding 54 patents in this subclass. Growth is company-wide, not class-only.

How does Y02B compare inside parent class Y02?

Inside Y02 (Technologies OR Applications FOR Mitigation OR Adaptation Against Climate Change), Y02B ranks #5 of 8 subclasses by grant volume and holds 8.7% of the parent class total. The largest sibling is Y02E (125,003 grants).

What to do with this data

Y02B in context - here's where to go next.

LG Electronics Inc. leads Y02B with 654 grants in this class. See full portfolio
Y02B ranks #50 of 670 by grant volume among all tracked CPC technology areas. See the ranking
Inside parent class Y02, the largest sibling subclass is Y02E with 125,003 grants. Explore Y02E

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

Methodology - Y02B figures are USPTO PatentsView granted-utility totals for this subclass (34,811 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.