CPC technology class · H01

H01F - Magnets

Magnets; inductances; transformers; selection of materials for their magnetic properties. 21,711 US utility patents granted 2015–2025, with the leading assignees and year-by-year grant trajectory.

Compiled by PlainPatent · May 15, 2026

21,711
US patents granted: #6/14
in H01: 5.3%
H01 class share: +20%
5-yr velocity

The verdict

According to USPTO PatentsView, Magnets ranks #93 of 670 CPC technology areas - 21,711 US patents granted since 2015, with recorded grant volume up 20% over five years.

#93
of 670 CPC technology areas: 21,711
US patents granted, 2015–2025: Murata Manufacturing
leading assignee (1,164): +20%
grant velocity, last 5 yrs

How H01F's grant cadence moved

Between 2020–2024, H01F recorded 10,442 grants versus 8,729 in 2015–2019 (+20% equal-window velocity). Across complete years, output peaked in 2019 at 2,207 grants and bottomed in 2015 at 1,294 (+71% peak-over-trough). Lead assignee Murata Manufacturing Co., Ltd. holds 5.4% of the class ; the top three share 10.8%.

Leaderboard read

H01F concentration, lead at 5.4%

Murata Manufacturing Co., Ltd. leads this historical grant record at 5.4% of H01F - foreign corporation assignees hold 78% of class grants (8,710 of 11,120). Figures describe granted US utility patents in this CPC subclass, not current investment or legal strength.

Leader's share: 5.4%
Top three share: 10.8%
Lead over #2: 260

Where H01F sits inside H01

Among 14 subclasses in H01 (Electric Elements), H01F ranks #6 and holds 5.3% 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 H01H 14,753 H01B 14,745 H01S 12,879

Rising assignees active in H01F

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 Shenzhen Shokz Co., Ltd. 288x 0 → 288 company-wide · 7 in H01F
#2 Huawei Digital Power Technologies Co., Ltd. 245x 0 → 245 company-wide · 13 in H01F
#3 Proterial, Ltd. 139x 0 → 139 company-wide · 27 in H01F
#4 Hitachi Energy Ltd 120x 0 → 120 company-wide · 52 in H01F
#5 Ceremorphic, Inc. 62x 0 → 62 company-wide · 5 in H01F

H01F grants by year, peak 2019 (2,207)

US utility-patent grants per year in H01F, 2015–2025 - recent five years are up 20% versus 2015–2019.

Murata Manufacturing

1,164
Tdk

904
Taiwan Semiconductor…

281
Hitachi

234
Taiyo Yuden

223
Jfe Steel

209
Sumitomo Electric…

171
Nippon Steel

167
Lg Innotek

158
Sumitomo Wiring…

119
Autonetworks

116
Abb Schweiz

115

What this shows Murata Manufacturing is the most active filer in H01F, holding 1,164 of the 21,711 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 H01F
Rank	Company	Patents in H01F
#1	Murata Manufacturing Co., Ltd.	1,164
#2	TDK Corporation	904
#3	Taiwan Semiconductor Manufacturing Company Ltd.	281
#4	Hitachi, Ltd.	234
#5	Taiyo Yuden Co., Ltd.	223
#6	JFE Steel Corporation	209
#7	Sumitomo Electric Industries, Ltd.	171
#8	Nippon Steel Corporation	167
#9	LG Innotek Co., Ltd.	158
#10	Sumitomo Wiring Systems, Ltd.	119
#11	Autonetworks Technologies, Ltd.	116
#12	ABB Schweiz AG	115
#13	Delta Electronics (Shanghai) Co., Ltd.	111
#14	Realtek Semiconductor Corp.	110
#15	WiTricity Corporation	107
#16	NuCurrent, Inc.	103
#17	Delta Electronics, Inc.	100
#18	Cyntec Co., Ltd.	99
#19	Sumida Corporation	76
#20	Siemens Healthcare Limited	64

Footprint here vs. claim strategy

Each dot is a leading H01F 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 H01F assignees by class footprint. Bubble size = patents in H01F. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Classes near H01F's 21,711-grant footprint

Nationwide nearest neighbors for H01F (#93 of 670 by volume ; lead share 5.4%) - not the H01 parent-class siblings above.

Nearest by grant volume

G03B 21,728 G03F 21,670 B25J 21,590 G11B 21,500

Nearest by lead-assignee share

C08F 5.4% A01P 5.4% C22C 5.3% B61K 5.3%

Questions about H01F

Which company holds the most patents in H01F?

Murata Manufacturing Co., Ltd. leads H01F with 1,164 patents (5.4% of the subclass). By PatentsView assignee type, foreign corporations account for 78% of class grants.

Which H01F assignees grew fastest recently?

Among assignees with ≥5 grants in H01F, Shenzhen Shokz Co., Ltd. shows the highest company-wide grant multiple (288x: 0 grants in 2019–2021 → 288 in 2022–2024) while holding 7 patents in this subclass. Growth is company-wide, not class-only.

How does H01F compare inside parent class H01?

Inside H01 (Electric Elements), H01F ranks #6 of 14 subclasses by grant volume and holds 5.3% of the parent class total. The largest sibling is H01L (165,178 grants).

What to do with this data

H01F in context - here's where to go next.

Murata Manufacturing Co., Ltd. leads H01F with 1,164 grants in this class. See full portfolio
H01F ranks #93 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 - H01F figures are USPTO PatentsView granted-utility totals for this subclass (21,711 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.