CPC technology class · H01

H01H - Electric Switches

Electric switches; relays; selectors; emergency protective devices. 14,753 US utility patents granted 2015–2025, with the leading assignees and year-by-year grant trajectory.

Compiled by PlainPatent · May 15, 2026

14,753
US patents granted: #7/14
in H01: 3.6%
H01 class share: -15%
5-yr velocity

The verdict

According to USPTO PatentsView, Electric Switches ranks #126 of 670 CPC technology areas - 14,753 US patents granted since 2015, with recorded grant volume down 15% over five years.

#126
of 670 CPC technology areas: 14,753
US patents granted, 2015–2025: Eaton Intelligent Power
leading assignee (549): -15%
grant velocity, last 5 yrs

How H01H's grant cadence moved

Between 2020–2024, H01H recorded 6,094 grants versus 7,150 in 2015–2019 (-15% equal-window velocity). Across complete years, output peaked in 2019 at 1,592 grants and bottomed in 2023 at 1,107 (+44% peak-over-trough). Lead assignee Eaton Intelligent Power Limited holds 3.7% of the class ; the top three share 8.5%.

Leaderboard read

H01H concentration, lead at 3.7%

Eaton Intelligent Power Limited leads this historical grant record at 3.7% of H01H - foreign corporation assignees hold 72% of class grants (6,283 of 8,766). Figures describe granted US utility patents in this CPC subclass, not current investment or legal strength.

Leader's share: 3.7%
Top three share: 8.5%
Lead over #2: 187

Where H01H sits inside H01

Among 14 subclasses in H01 (Electric Elements), H01H ranks #7 and holds 3.6% 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 H01B 14,745 H01S 12,879

Rising assignees active in H01H

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 Huawei Digital Power Technologies Co., Ltd. 245x 0 → 245 company-wide · 19 in H01H
#2 Hitachi Energy Ltd 120x 0 → 120 company-wide · 31 in H01H
#3 TE Connectivity Solutions GmbH 68x 4 → 271 company-wide · 7 in H01H
#4 Dehn SE 26x 0 → 26 company-wide · 9 in H01H
#5 Hitachi Energy Switzerland AG 24x 7 → 171 company-wide · 23 in H01H

H01H grants by year, peak 2019 (1,592)

US utility-patent grants per year in H01H, 2015–2025 - recent five years are down 15% versus 2015–2019.

Eaton Intelligent…

549
Siemens Aktiengesellsc…

362
Abb Schweiz

349
Omron

272
Schneider Electric…

247
Primax

218
Eaton

211
Lsis

207
Darfon

167
Littelfuse

158
Lutron Technology

148
Yazaki

145

What this shows Eaton Intelligent… is the most active filer in H01H, holding 549 of the 14,753 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 H01H
Rank	Company	Patents in H01H
#1	Eaton Intelligent Power Limited	549
#2	Siemens Aktiengesellschaft	362
#3	ABB Schweiz AG	349
#4	Omron Corporation	272
#5	Schneider Electric Industries SAS	247
#6	Primax Electronics Ltd.	218
#7	Eaton Corporation	211
#8	Lsis Co., Ltd.	207
#9	Darfon Electronics Corp.	167
#10	Littelfuse, Inc.	158
#11	Lutron Technology Company LLC	148
#12	Yazaki Corporation	145
#13	Lite-on Technology Corporation	119
#14	Hubbell Incorporated	113
#15	Rockwell Automation Technologies, Inc.	111
#16	Schneider Electric USA, Inc.	104
#17	Alps Alpine Co., Ltd.	99
#18	Lite-on Electronics (GUANGZHOU) Limited	99
#19	ABB Technology AG	86
#20	Siemens Industry, Inc.	83

Footprint here vs. claim strategy

Each dot is a leading H01H 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 H01H assignees by class footprint. Bubble size = patents in H01H. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Classes near H01H's 14,753-grant footprint

Nationwide nearest neighbors for H01H (#126 of 670 by volume ; lead share 3.7%) - not the H01 parent-class siblings above.

Nearest by grant volume

H01B 14,745 F16B 14,787 G01M 14,845 C04B 14,853

Nearest by lead-assignee share

B60B 3.7% H04R 3.7% H02K 3.7% C05B 3.7%

Questions about H01H

Which company holds the most patents in H01H?

Eaton Intelligent Power Limited leads H01H with 549 patents (3.7% of the subclass). By PatentsView assignee type, foreign corporations account for 72% of class grants.

Which H01H assignees grew fastest recently?

Among assignees with ≥5 grants in H01H, Huawei Digital Power Technologies Co., Ltd. shows the highest company-wide grant multiple (245x: 0 grants in 2019–2021 → 245 in 2022–2024) while holding 19 patents in this subclass. Growth is company-wide, not class-only.

How does H01H compare inside parent class H01?

Inside H01 (Electric Elements), H01H ranks #7 of 14 subclasses by grant volume and holds 3.6% of the parent class total. The largest sibling is H01L (165,178 grants).

What to do with this data

H01H in context - here's where to go next.

Eaton Intelligent Power Limited leads H01H with 549 grants in this class. See full portfolio
H01H ranks #126 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 - H01H figures are USPTO PatentsView granted-utility totals for this subclass (14,753 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.