CPC technology class · H01

H01C - Resistors

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

Compiled by PlainPatent · May 15, 2026

2,105
US patents granted: #12/14
in H01: 0.5%
H01 class share: -5%
5-yr velocity

The verdict

According to USPTO PatentsView, Resistors ranks #365 of 670 CPC technology areas - 2,105 US patents granted since 2015, with recorded grant volume down 5% over five years.

#365
of 670 CPC technology areas: 2,105
US patents granted, 2015–2025: Murata Manufacturing
leading assignee (114): -5%
grant velocity, last 5 yrs

How H01C's grant cadence moved

Between 2020–2024, H01C recorded 935 grants versus 981 in 2015–2019 (-5% equal-window velocity). Across complete years, output peaked in 2019 at 239 grants and bottomed in 2015 at 144 (+66% peak-over-trough). Lead assignee KOA Corporation holds 4.2% of the class ; the top three share 9.7%.

Leaderboard read

H01C concentration, lead at 4.2%

KOA Corporation leads this historical grant record at 4.2% of H01C - foreign corporation assignees hold 73% of class grants (630 of 864). Figures describe granted US utility patents in this CPC subclass, not current investment or legal strength.

Leader's share: 4.2%
Top three share: 9.7%
Lead over #2: 20

Where H01C sits inside H01

Among 14 subclasses in H01 (Electric Elements), H01C ranks #12 and holds 0.5% of the parent class's 406,481 recorded grants. Sibling chips below are the other subclasses in the same parent class, not the nationwide volume/lead-share peers further down.

H01L 165,178 H01M 63,620 H01R 35,523 H01Q 29,793 H01J 24,482 H01F 21,711 H01H 14,753 H01B 14,745

Rising assignees active in H01C

Company-wide grant multiples (2022–2024 vs 2019–2021) among assignees with ≥5 patents in this subclass. Growth is company-wide; class patent counts are subclass-specific.

#1 Kyocera AVX Components Corporation 100x 1 → 100 company-wide · 9 in H01C
#2 Dehn SE 26x 0 → 26 company-wide · 5 in H01C
#3 Semitec Corporation 4.50x 2 → 9 company-wide · 8 in H01C
#4 TDK Electronics AG 2.22x 58 → 129 company-wide · 35 in H01C
#5 Tatsumi Ryoki Co., Ltd 2.17x 6 → 13 company-wide · 5 in H01C

H01C grants by year, peak 2019 (239)

US utility-patent grants per year in H01C, 2015–2025 - recent five years are down 5% versus 2015–2019.

Koa

88
Rohm

68
Epcos

48
Littelfuse

47
Polytronics Technology

38
Altria Client Services

37
Tdk

35
Watlow Electric…

32
Fuzetec Technology

24
Vishay Dale

23
Phoenix Contact & Kg

22
Dongguan Littelfuse

15

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.

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

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).

Classes near H01C's 2,105-grant footprint

Nationwide nearest neighbors for H01C (#365 of 670 by volume ; lead share 5.4%) - not the H01 parent-class siblings above.

Nearest by grant volume

G09C 2,112 F27B 2,129 H05G 2,073 D03D 2,141

Nearest by lead-assignee share

F23C 5.4% C08F 5.4% H01F 5.4% C09J 5.5%

Questions about H01C

Which company holds the most patents in H01C?

Murata Manufacturing Co., Ltd. leads H01C with 114 patents (4.2% of the subclass). By PatentsView assignee type, foreign corporations account for 73% of class grants.

Which H01C assignees grew fastest recently?

Among assignees with ≥5 grants in H01C, Kyocera AVX Components Corporation shows the highest company-wide grant multiple (100x: 1 grants in 2019–2021 → 100 in 2022–2024) while holding 9 patents in this subclass. Growth is company-wide, not class-only.

How does H01C compare inside parent class H01?

Inside H01 (Electric Elements), H01C ranks #12 of 14 subclasses by grant volume and holds 0.5% of the parent class total. The largest sibling is H01L (165,178 grants).

What to do with this data

H01C in context - here's where to go next.

KOA Corporation leads H01C with 88 grants in this class. See full portfolio
H01C ranks #365 of 670 by grant volume among all tracked CPC technology areas. See the ranking
Inside parent class H01, the largest sibling subclass is H01L with 165,178 grants. Explore H01L

Figures reflect USPTO PatentsView grant data through 2026-05-15; pending applications not yet granted are not counted.

Methodology - H01C figures are USPTO PatentsView granted-utility totals for this subclass (2,105 grants in the tracked window).

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.