PlainPatent

CPC technology class · H03

H03G - Control OF Amplification

Control of amplification. 5,213 US utility patents granted 2015–2025, with the leading assignees and year-by-year filing trajectory.

5,213
US patents granted
H03
Parent CPC class
20
Active assignees
-24%
5-yr velocity

The verdict

Control OF Amplification ranks #249 of 670 CPC technology areas - 5,213 US patents granted since 2015, with filing down 24% over five years.

#249
of 670 CPC technology areas
5,213
US patents granted, 2015–2025
Sonos
leading assignee (290)
-24%
filing velocity, last 5 yrs
Top assignee: Sonos, Inc. (290 patents)

CPC subclass H03G - CONTROL OF AMPLIFICATION - covers 5,213 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 H03G is shaped by 20 distinct companies actively filing in this space. Sonos, Inc. leads with 290 patents, followed by Dolby Laboratories Licensing Corporation at 169 grants and Skyworks Solutions, Inc. at 150.

Filing activity in H03G is down 24% over the past five years versus 2015-2019, a notable slowdown that may signal a maturing field. All counts come directly from USPTO PatentsView and reflect US granted utility patents only.

Is H03G innovation accelerating?

US utility-patent grants per year in H03G, 2015–2025 - recent five years are down 24% versus 2015–2019.

100200300400500600700 20152016201720182019202020212022202320242025 208

Who leads H03G?

The 12 most active assignees in CONTROL OF AMPLIFICATION - wider bars mean more grants

patents

What this shows Sonos is the most active filer in H03G, holding 290 of the 5,213 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 H03G
Rank Company Patents in H03G
#1 Sonos, Inc. 290
#2 Dolby Laboratories Licensing Corporation 169
#3 Skyworks Solutions, Inc. 150
#4 Cirrus Logic, Inc. 133
#5 Bose Corporation 74
#6 Dolby International AB 68
#7 Yamaha Corporation 58
#8 Realtek Semiconductor Corp. 56
#9 Psemi Corporation 56
#10 Harman International Industries, Incorporated 45
#11 Analog Devices, Inc. 42
#12 Qorvo US, Inc. 41
#13 Voyetra Turtle Beach, Inc. 37
#14 Koss Corporation 32
#15 Inphi Corporation 29
#16 Biamp Systems, Llc 28
#17 Silicon Laboratories Inc. 26
#18 DTS, Inc. 25
#19 Bongiovi Acoustic Llc 23
#20 Invensense, Inc. 19

About This Class

CPC subclass H03G belongs to class H03.

5,213 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 H03G 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 H03G assignees by class footprint. Bubble size = patents in H03G. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Top 14 H03G assignees by class footprint. Bubble size = patents in H03G. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 14 data points (bubble-sized by third dimension). 10152025 0100200300400 Patents in H03G Avg claims / patent (company-wide) SonosDolby Laboratories Li…Skyworks SolutionsCirrus LogicBoseDolby International AbYamahaRealtek SemiconductorpsemiHarman International…Analog DevicesQorvo UsVoyetra Turtle BeachKoss
Top 14 H03G assignees by class footprint. Bubble size = patents in H03G. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Frequently Asked Questions

What is CPC class H03G?
CPC subclass H03G covers CONTROL OF AMPLIFICATION. It belongs to CPC class H03 (ELECTRONIC CIRCUITRY), with 5,213 US utility patents granted since 2015.
How many patents have been filed in H03G?
5,213 US utility patents were granted in CPC subclass H03G between 2015 and 2025, based on USPTO PatentsView data.
Which company holds the most patents in H03G?
Sonos, Inc. leads H03G with 290 patents, making it the most active assignee in this technology area.
How is patent data for H03G 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 H03G 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.