PlainPatent

CPC technology class · H02

H02M - Apparatus For Conversion Between Ac And Ac

Apparatus for conversion between ac and ac, between ac and dc, or between dc and dc, and for use with mains or similar power supply systems; conversion of dc or ac input power into surge output power; control or regulation thereof. 33,952 US utility patents granted 2015–2025, with the leading assignees and year-by-year grant trajectory.

33,952
US patents granted
#2/9
in H02
21.0%
H02 class share
-8%
5-yr velocity

The verdict

According to USPTO PatentsView, Apparatus For Conversion Between Ac And Ac ranks #52 of 670 CPC technology areas - 33,952 US patents granted since 2015, with recorded grant volume down 8% over five years.

#52
of 670 CPC technology areas
33,952
US patents granted, 2015–2025
Mitsubishi Electric
leading assignee (1,101)
-8%
grant velocity, last 5 yrs

How H02M's grant cadence moved

Between 2020–2024, H02M recorded 14,523 grants versus 15,776 in 2015–2019 (-8% equal-window velocity). Across complete years, output peaked in 2019 at 3,604 grants and bottomed in 2015 at 2,407 (+50% peak-over-trough). Lead assignee Mitsubishi Electric Corporation holds 3.2% of the class ; the top three share 7.7%.

Leaderboard read

H02M concentration, lead at 3.2%

Mitsubishi Electric Corporation leads this historical grant record at 3.2% of H02M - foreign corporation assignees hold 70% of class grants (16,348 of 23,471). Figures describe granted US utility patents in this CPC subclass, not current investment or legal strength.

Leader's share
3.2%

1,101 of 33,952 grants

Top three share
7.7%

of the class's recorded grants

Lead over #2
156

more grants than Texas Instruments Incorporated

Where H02M sits inside H02

Among 9 subclasses in H02 (GENERATION; Conversion OR Distribution OF Electric Power), H02M ranks #2 and holds 21.0% of the parent class's 161,326 recorded grants. Sibling chips below are the other subclasses in the same parent class, not the nationwide volume/lead-share peers further down.

H02J 49,883 H02K 26,848 H02P 16,031 H02G 11,084 H02H 10,591 H02S 6,483 H02N 3,799 H02B 2,655

Rising assignees active in H02M

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 Huawei Digital Power Technologies Co., Ltd. 245x 0 → 245 company-wide · 163 in H02M
  2. #2 Inspur Suzhou Intelligent Technology Co., Ltd. 217x 0 → 217 company-wide · 5 in H02M
  3. #3 HL Mando Corporation 212x 0 → 212 company-wide · 6 in H02M
  4. #4 Hitachi Energy Ltd 120x 0 → 120 company-wide · 14 in H02M
  5. #5 Contemporary Amperex Technology (HONG KONG) Limited 87x 0 → 87 company-wide · 11 in H02M

H02M grants by year, peak 2019 (3,604)

US utility-patent grants per year in H02M, 2015–2025 - recent five years are down 8% versus 2015–2019.

2,0002,5003,0003,5004,000 20152016201720182019202020212022202320242025 2,288

Who leads H02M?

The 12 most active assignees in Apparatus FOR Conversion Between AC AND AC, Between AC AND DC, OR Between DC AND DC, AND FOR USE With Mains OR Similar Power Supply SYSTEMS; Conversion OF DC OR AC Input Power Into Surge Output POWER; Control OR Regulation Thereof - wider bars mean more grants

patents

What this shows Mitsubishi Electric is the most active filer in H02M, holding 1,101 of the 33,952 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 H02M
Rank Company Patents in H02M
#1 Mitsubishi Electric Corporation 1,101
#2 Texas Instruments Incorporated 945
#3 Fuji Electric Co., Ltd. 565
#4 Infineon Technologies Austria AG 537
#5 Denso Corporation 536
#6 Rohm Co., Ltd. 516
#7 Delta Electronics, Inc. 417
#8 Semiconductor Components Industries, LLC 358
#9 STMicroelectronics SA 331
#10 Silergy Semiconductor Technology (Hangzhou) Ltd. 322
#11 Delta Electronics (Shanghai) Co., Ltd. 307
#12 Siemens Aktiengesellschaft 288
#13 Infineon Technologies AG 286
#14 Power Integrations, Inc. 278
#15 ABB Schweiz AG 277
#16 Murata Manufacturing Co., Ltd. 268
#17 Dialog Semiconductor (UK) Limited 244
#18 Richtek Technology Corporation 237
#19 Hamilton Sundstrand Corporation (HSC) 224
#20 NXP B.V. 214

Footprint here vs. claim strategy

Each dot is a leading H02M 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 H02M assignees by class footprint. Bubble size = patents in H02M. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 14 data points (bubble-sized by third dimension). 510152025 20040060080010001200 Patents in H02M Avg claims / patent (company-wide) Mitsubishi ElectricTexas Instruments…Fuji ElectricInfineon AustriaDensoRohmDeltaSemiconductor…StmicroelectronicsSilergy Semiconductor…Delta (Shanghai)Siemens Aktiengesellsc…InfineonPower Integrations
Top 14 H02M assignees by class footprint. Bubble size = patents in H02M. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Classes near H02M's 33,952-grant footprint

Nationwide nearest neighbors for H02M (#52 of 670 by volume ; lead share 3.2%) - not the H02 parent-class siblings above.

Nearest by grant volume

H04R 33,502 H05B 33,418 B60K 34,645 Y02B 34,811

Nearest by lead-assignee share

C11C 3.2% G07C 3.3% B09B 3.3% F22B 3.2%

Questions about H02M

Which company holds the most patents in H02M?
Mitsubishi Electric Corporation leads H02M with 1,101 patents (3.2% of the subclass). By PatentsView assignee type, foreign corporations account for 70% of class grants.
Which H02M assignees grew fastest recently?
Among assignees with ≥5 grants in H02M, 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 163 patents in this subclass. Growth is company-wide, not class-only.
How does H02M compare inside parent class H02?
Inside H02 (GENERATION; Conversion OR Distribution OF Electric Power), H02M ranks #2 of 9 subclasses by grant volume and holds 21.0% of the parent class total. The largest sibling is H02J (49,883 grants).

What to do with this data

H02M in context - here's where to go next.

  • Mitsubishi Electric Corporation leads H02M with 1,101 grants in this class. See full portfolio
  • H02M ranks #52 of 670 by grant volume among all tracked CPC technology areas. See the ranking
  • Inside parent class H02, the largest sibling subclass is H02J with 49,883 grants. Explore H02J

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

Methodology - H02M figures are USPTO PatentsView granted-utility totals for this subclass (33,952 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.