PlainPatent

CPC technology class · H01

H01C - Resistors

Resistors. 2,105 US utility patents granted 2015–2025, with the leading assignees and year-by-year filing trajectory.

2,105
US patents granted
H01
Parent CPC class
20
Active assignees
+8%
5-yr velocity

The verdict

Resistors ranks #365 of 670 CPC technology areas - 2,105 US patents granted since 2015, with filing up 8% over five years.

#365
of 670 CPC technology areas
2,105
US patents granted, 2015–2025
Murata Manufacturing
leading assignee (114)
+8%
filing velocity, last 5 yrs
Top assignee: Murata Manufacturing Co., Ltd. (114 patents)

CPC subclass H01C - RESISTORS - covers 2,105 US utility patents granted between 2015 and 2025 according to USPTO PatentsView records, within the broader CPC class H01 (ELECTRIC ELEMENTS). See our CPC classification guide for how the system works.

The competitive landscape in H01C is shaped by 20 distinct companies actively filing in this space. Murata Manufacturing Co., Ltd. leads with 114 patents, followed by Rohm Co., Ltd. at 68 grants and Epcos Ag at 48.

Filing activity in H01C is up 8% 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 H01C innovation accelerating?

US utility-patent grants per year in H01C, 2015–2025 - recent five years are up 8% versus 2015–2019.

100150200250 20152016201720182019202020212022202320242025 121

Who leads H01C?

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

patents

What this shows Murata Manufacturing is the most active filer in H01C, holding 114 of the 2,105 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 H01C
Rank Company Patents in H01C
#1 KOA Corporation 88
#2 Rohm Co., Ltd. 68
#3 Epcos Ag 48
#4 Littelfuse, Inc. 47
#5 Polytronics Technology Corp. 38
#6 Altria Client Services Llc 37
#7 TDK Electronics Ag 35
#8 Watlow Electric Manufacturing Company 32
#9 Fuzetec Technology Co., Ltd. 24
#10 Vishay Dale Electronics, Llc 23
#11 Phoenix Contact Gmbh & Co. KG 22
#12 Dongguan Littelfuse Electronics Company Limited 15
#13 AVX Corporation 14
#14 Suncall Corporation 11
#15 Amotech Co., Ltd. 10
#16 Isabellenhütte Heusler Gmbh & Co. KG 10
#17 Yageo Corporation 10
#18 Kemet Electronics Corporation 9
#19 Kyocera AVX Components Corporation 9
#20 DEHN + Söhne Gmbh + Co. KG 9

About This Class

CPC subclass H01C belongs to class H01.

2,105 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 H01C 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 H01C assignees by class footprint. Bubble size = patents in H01C. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Top 14 H01C assignees by class footprint. Bubble size = patents in H01C. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 14 data points (bubble-sized by third dimension). 510152025 020406080100 Patents in H01C Avg claims / patent (company-wide) KoaRohmEpcosLittelfusePolytronics TechnologyAltria Client ServicesTdkWatlow Electric Manuf…Fuzetec TechnologyVishay DalePhoenix Contact & KgDongguan LittelfuseAvxSuncall
Top 14 H01C assignees by class footprint. Bubble size = patents in H01C. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Frequently Asked Questions

What is CPC class H01C?
CPC subclass H01C covers RESISTORS. It belongs to CPC class H01 (ELECTRIC ELEMENTS), with 2,105 US utility patents granted since 2015.
How many patents have been filed in H01C?
2,105 US utility patents were granted in CPC subclass H01C between 2015 and 2025, based on USPTO PatentsView data.
Which company holds the most patents in H01C?
Murata Manufacturing Co., Ltd. leads H01C with 114 patents, making it the most active assignee in this technology area.
How is patent data for H01C 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., H01) is a broad technology category. Subclasses like H01C 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.