PlainPatent

CPC technology class · H03

H03M - Coding

Coding; decoding; code conversion in general. 21,338 US utility patents granted 2015–2025, with the leading assignees and year-by-year filing trajectory.

21,338
US patents granted
H03
Parent CPC class
20
Active assignees
+15%
5-yr velocity

The verdict

Coding ranks #97 of 670 CPC technology areas - 21,338 US patents granted since 2015, with filing up 15% over five years.

#97
of 670 CPC technology areas
21,338
US patents granted, 2015–2025
Samsung
leading assignee (1,180)
+15%
filing velocity, last 5 yrs
Top assignee: Samsung Electronics Co., Ltd. (1,180 patents)

CPC subclass H03M - CODING; DECODING; CODE CONVERSION IN GENERAL - covers 21,338 US utility patents granted between 2015 and 2025 according to USPTO PatentsView records, within the broader CPC class H03 (ELECTRONIC CIRCUITRY). See our CPC classification guide for how the system works.

The competitive landscape in H03M is shaped by 20 distinct companies actively filing in this space. Samsung Electronics Co., Ltd. leads with 1,180 patents, followed by Intel Corporation at 640 grants and Qualcomm Incorporated at 613.

Filing activity in H03M is up 15% 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 H03M innovation accelerating?

US utility-patent grants per year in H03M, 2015–2025 - recent five years are up 15% versus 2015–2019.

1,0001,5002,0002,500 20152016201720182019202020212022202320242025 1,201

Who leads H03M?

The 12 most active assignees in CODING; DECODING; CODE CONVERSION IN GENERAL - wider bars mean more grants

patents

What this shows Samsung is the most active filer in H03M, holding 1,180 of the 21,338 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 H03M
Rank Company Patents in H03M
#1 Huawei Technologies Co., Ltd. 658
#2 Intel Corporation 640
#3 Qualcomm Incorporated 613
#4 Texas Instruments Incorporated 579
#5 SK Hynix Inc. 414
#6 Micron Technology, Inc. 358
#7 Korea Advanced Institute OF Science AND Technology 304
#8 Telefonaktiebolaget LM Ericsson (publ) 227
#9 Infineon Technologies Ag 225
#10 PURE Storage, Inc. 201
#11 Western Digital Technologies, Inc. 190
#12 Realtek Semiconductor Corp. 189
#13 Seagate Technology Llc 176
#14 Cirrus Logic, Inc. 175
#15 Analog Devices, Inc. 168
#16 NXP B.v. 161
#17 Mediatek Inc. 160
#18 Xilinx, Inc. 148
#19 Renesas Electronics Corporation 143
#20 EMC IP Holding Company Llc 136

About This Class

CPC subclass H03M belongs to class H03.

21,338 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 H03M 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 H03M assignees by class footprint. Bubble size = patents in H03M. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Top 14 H03M assignees by class footprint. Bubble size = patents in H03M. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 14 data points (bubble-sized by third dimension). 1015202530 0200400600800 Patents in H03M Avg claims / patent (company-wide) HuaweiIntelQualcomm IncorporatedTexas Instruments Inc…Sk hynixMicron TechnologyKorea Advanced Instit…Telefonaktiebolaget L…InfineonPure StorageWestern DigitalRealtek SemiconductorSeagate TechnologyCirrus Logic
Top 14 H03M assignees by class footprint. Bubble size = patents in H03M. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Frequently Asked Questions

What is CPC class H03M?
CPC subclass H03M covers CODING; DECODING; CODE CONVERSION IN GENERAL. It belongs to CPC class H03 (ELECTRONIC CIRCUITRY), with 21,338 US utility patents granted since 2015.
How many patents have been filed in H03M?
21,338 US utility patents were granted in CPC subclass H03M between 2015 and 2025, based on USPTO PatentsView data.
Which company holds the most patents in H03M?
Samsung Electronics Co., Ltd. leads H03M with 1,180 patents, making it the most active assignee in this technology area.
How is patent data for H03M 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., H03) is a broad technology category. Subclasses like H03M 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.