PlainPatent

CPC technology class · H04

H04J - Multiplex Communication

Multiplex communication. 16,888 US utility patents granted 2015–2025, with the leading assignees and year-by-year filing trajectory.

16,888
US patents granted
H04
Parent CPC class
20
Active assignees
-14%
5-yr velocity

The verdict

Multiplex Communication ranks #112 of 670 CPC technology areas - 16,888 US patents granted since 2015, with filing down 14% over five years.

#112
of 670 CPC technology areas
16,888
US patents granted, 2015–2025
Huawei
leading assignee (1,042)
-14%
filing velocity, last 5 yrs
Top assignee: Huawei Technologies Co., Ltd. (1,042 patents)

CPC subclass H04J - MULTIPLEX COMMUNICATION - covers 16,888 US utility patents granted between 2015 and 2025 according to USPTO PatentsView records, within the broader CPC class H04 (ELECTRIC COMMUNICATION TECHNIQUE). See our CPC classification guide for how the system works.

The competitive landscape in H04J is shaped by 20 distinct companies actively filing in this space. Huawei Technologies Co., Ltd. leads with 1,042 patents, followed by LG Electronics Inc. at 1,000 grants and Qualcomm Incorporated at 920.

Filing activity in H04J is down 14% 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 H04J innovation accelerating?

US utility-patent grants per year in H04J, 2015–2025 - recent five years are down 14% versus 2015–2019.

5001,0001,5002,000 20152016201720182019202020212022202320242025 716

Who leads H04J?

The 12 most active assignees in MULTIPLEX COMMUNICATION - wider bars mean more grants

patents

What this shows Huawei is the most active filer in H04J, holding 1,042 of the 16,888 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 H04J
Rank Company Patents in H04J
#1 Huawei Technologies Co., Ltd. 1,042
#2 LG Electronics Inc. 1,000
#3 Qualcomm Incorporated 920
#4 Telefonaktiebolaget LM Ericsson (publ) 679
#5 Fujitsu Limited 518
#6 NEC Corporation 354
#7 Ciena Corporation 289
#8 ZTE Corporation 249
#9 Korea Advanced Institute OF Science AND Technology 242
#10 Cisco Technology, Inc. 230
#11 Nippon Telegraph AND Telephone Corporation 226
#12 Panasonic Intellectual Property Corporation Of America 214
#13 Infinera Corp. 200
#14 Sun Patent Trust 177
#15 Alcatel Lucent 172
#16 NTT Docomo, Inc. 170
#17 AT&T Intellectual Property I, L.p. 163
#18 Futurewei Technologies, Inc. 159
#19 Intel IP Corporation 159
#20 Sharp Kabushiki Kaisha 158

About This Class

CPC subclass H04J belongs to class H04.

16,888 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 H04J 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 H04J assignees by class footprint. Bubble size = patents in H04J. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Top 14 H04J assignees by class footprint. Bubble size = patents in H04J. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 14 data points (bubble-sized by third dimension). 5101520253035 020040060080010001200 Patents in H04J Avg claims / patent (company-wide) HuaweiLgQualcomm IncorporatedTelefonaktiebolaget L…FujitsuNecCienaZteKorea Advanced Instit…Cisco TechnologyNippon Telegraph And…Panasonic Intellectua…InfineraSun Patent Trust
Top 14 H04J assignees by class footprint. Bubble size = patents in H04J. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Frequently Asked Questions

What is CPC class H04J?
CPC subclass H04J covers MULTIPLEX COMMUNICATION. It belongs to CPC class H04 (ELECTRIC COMMUNICATION TECHNIQUE), with 16,888 US utility patents granted since 2015.
How many patents have been filed in H04J?
16,888 US utility patents were granted in CPC subclass H04J between 2015 and 2025, based on USPTO PatentsView data.
Which company holds the most patents in H04J?
Huawei Technologies Co., Ltd. leads H04J with 1,042 patents, making it the most active assignee in this technology area.
How is patent data for H04J 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., H04) is a broad technology category. Subclasses like H04J 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.