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 filing trajectory.

33,952
US patents granted
H02
Parent CPC class
20
Active assignees
+7%
5-yr velocity

The verdict

Apparatus FOR Conversion Between AC AND AC ranks #52 of 670 CPC technology areas - 33,952 US patents granted since 2015, with filing up 7% over five years.

#52
of 670 CPC technology areas
33,952
US patents granted, 2015–2025
Mitsubishi Electric
leading assignee (1,101)
+7%
filing velocity, last 5 yrs
Top assignee: Mitsubishi Electric Corporation (1,101 patents)

CPC subclass H02M - 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 - covers 33,952 US utility patents granted between 2015 and 2025 according to USPTO PatentsView records, within the broader CPC class H02 (GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER). See our CPC classification guide for how the system works.

The competitive landscape in H02M is shaped by 20 distinct companies actively filing in this space. Mitsubishi Electric Corporation leads with 1,101 patents, followed by Texas Instruments Incorporated at 945 grants and FUJI Electric Co., Ltd. at 565.

Filing activity in H02M is up 7% over the past five years versus 2015-2019, a relatively steady filing pace. All counts come directly from USPTO PatentsView and reflect US granted utility patents only.

Is H02M innovation accelerating?

US utility-patent grants per year in H02M, 2015–2025 - recent five years are up 7% 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

About This Class

CPC subclass H02M belongs to class H02.

33,952 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 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).

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 Inc…Fuji ElectricInfineon AustriaDensoRohmDeltaSemiconductor Compone…StmicroelectronicsSilergy Semiconductor…Delta (Shanghai)Siemens Aktiengesells…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).

Frequently Asked Questions

What is CPC class H02M?
CPC subclass H02M covers 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. It belongs to CPC class H02 (GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER), with 33,952 US utility patents granted since 2015.
How many patents have been filed in H02M?
33,952 US utility patents were granted in CPC subclass H02M between 2015 and 2025, based on USPTO PatentsView data.
Which company holds the most patents in H02M?
Mitsubishi Electric Corporation leads H02M with 1,101 patents, making it the most active assignee in this technology area.
How is patent data for H02M 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., H02) is a broad technology category. Subclasses like H02M 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.