CPC technology class · H01

H01J - Electric Discharge Tubes Or Discharge Lamps

Electric discharge tubes or discharge lamps. 24,482 US utility patents granted 2015–2025, with the leading assignees and year-by-year grant trajectory.

Compiled by PlainPatent · May 15, 2026

24,482
US patents granted: #5/14
in H01: 6.0%
H01 class share: -2%
5-yr velocity

The verdict

According to USPTO PatentsView, Electric Discharge Tubes Or Discharge Lamps ranks #83 of 670 CPC technology areas - 24,482 US patents granted since 2015, with recorded grant volume down 2% over five years.

#83
of 670 CPC technology areas: 24,482
US patents granted, 2015–2025: Applied Materials
leading assignee (2,108): -2%
grant velocity, last 5 yrs

How H01J's grant cadence moved

Between 2020–2024, H01J recorded 10,808 grants versus 11,010 in 2015–2019 (-2% equal-window velocity). Across complete years, output peaked in 2020 at 2,446 grants and bottomed in 2023 at 1,986 (+23% peak-over-trough). Lead assignee Applied Materials, Inc. holds 8.6% of the class ; the top three share 19.8%.

Leaderboard read

H01J concentration, lead at 8.6%

Applied Materials, Inc. leads this historical grant record at 8.6% of H01J - foreign corporation assignees hold 57% of class grants (10,592 of 18,668). Figures describe granted US utility patents in this CPC subclass, not current investment or legal strength.

Leader's share: 8.6%
Top three share: 19.8%
Lead over #2: 379

Where H01J sits inside H01

Among 14 subclasses in H01 (Electric Elements), H01J ranks #5 and holds 6.0% 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 H01F 21,711 H01H 14,753 H01B 14,745 H01S 12,879

Rising assignees active in H01J

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 Siemens Healthineers AG 222x 0 → 222 company-wide · 10 in H01J
#2 JX Metals Corporation 41x 0 → 41 company-wide · 8 in H01J
#3 SKY Tech Inc. 39x 0 → 39 company-wide · 15 in H01J
#4 Waters Technologies Ireland Limited 24x 1 → 24 company-wide · 11 in H01J
#5 Tmeic Corporation 24x 2 → 48 company-wide · 5 in H01J

H01J grants by year, peak 2020 (2,446)

US utility-patent grants per year in H01J, 2015–2025 - recent five years are down 2% versus 2015–2019.

Applied Materials

2,108
Tokyo Electron

1,729
Lam Research

1,018
Taiwan Semiconductor…

537
Hitachi High-

507
Shimadzu

496
Micromass Uk

487
Hitachi High-tech

465
Fei

423
Nuflare Technology

349
Varian Semiconductor…

251
Asml Netherlands B V

246

What this shows Applied Materials is the most active filer in H01J, holding 2,108 of the 24,482 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 H01J
Rank	Company	Patents in H01J
#1	Applied Materials, Inc.	2,108
#2	Tokyo Electron Limited	1,729
#3	Lam Research Corporation	1,018
#4	Taiwan Semiconductor Manufacturing Company Ltd.	537
#5	Hitachi High-Technologies Corporation	507
#6	Shimadzu Corporation	496
#7	Micromass UK Limited	487
#8	Hitachi High-tech Corporation	465
#9	FEI Company	423
#10	NuFlare Technology, Inc.	349
#11	Varian Semiconductor Equipment Associates, Inc.	251
#12	Asml Netherlands B.V.	246
#13	DH Technologies Development PTE. Ltd.	244
#14	Thermo Fisher Scientific (BREMEN) GMBH	236
#15	Thermo Finnigan LLC	225
#16	Jeol Ltd.	219
#17	ASM IP Holding B.V.	212
#18	Kla-tencor Corporation	181
#19	Hamamatsu Photonics K.K.	174
#20	Purdue Research Foundation	170

Footprint here vs. claim strategy

Each dot is a leading H01J 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 H01J assignees by class footprint. Bubble size = patents in H01J. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Classes near H01J's 24,482-grant footprint

Nationwide nearest neighbors for H01J (#83 of 670 by volume ; lead share 8.6%) - not the H01 parent-class siblings above.

Nearest by grant volume

F01D 24,492 F21V 23,679 A61L 25,308 H10H 25,379

Nearest by lead-assignee share

C06B 8.6% C10G 8.6% G06N 8.5% A63F 8.4%

Questions about H01J

Which company holds the most patents in H01J?

Applied Materials, Inc. leads H01J with 2,108 patents (8.6% of the subclass). By PatentsView assignee type, foreign corporations account for 57% of class grants.

Which H01J assignees grew fastest recently?

Among assignees with ≥5 grants in H01J, Siemens Healthineers AG shows the highest company-wide grant multiple (222x: 0 grants in 2019–2021 → 222 in 2022–2024) while holding 10 patents in this subclass. Growth is company-wide, not class-only.

How does H01J compare inside parent class H01?

Inside H01 (Electric Elements), H01J ranks #5 of 14 subclasses by grant volume and holds 6.0% of the parent class total. The largest sibling is H01L (165,178 grants).

What to do with this data

H01J in context - here's where to go next.

Applied Materials, Inc. leads H01J with 2,108 grants in this class. See full portfolio
H01J ranks #83 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 - H01J figures are USPTO PatentsView granted-utility totals for this subclass (24,482 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.