PlainPatent

CPC technology class · H01

H01K - Electric Incandescent Lamps

Electric incandescent lamps. 189 US utility patents granted 2015–2025, with the leading assignees and year-by-year grant trajectory.

189
US patents granted
#14/14
in H01
0.0%
H01 class share
-25%
5-yr velocity

The verdict

According to USPTO PatentsView, Electric Incandescent Lamps ranks #603 of 670 CPC technology areas - 189 US patents granted since 2015, with recorded grant volume down 25% over five years.

#603
of 670 CPC technology areas
189
US patents granted, 2015–2025
Applied Materials
leading assignee (15)
-25%
grant velocity, last 5 yrs

How H01K's grant cadence moved

Between 2020–2024, H01K recorded 76 grants versus 102 in 2015–2019 (-25% equal-window velocity). Across complete years, output peaked in 2019 at 25 grants and bottomed in 2023 at 9 (+178% peak-over-trough). Lead assignee L&L Candle Company, LLC holds 4.8% of the class ; the top three share 10.1%.

Leaderboard read

H01K concentration, lead at 4.8%

L&L Candle Company, LLC leads this historical grant record at 4.8% of H01K - foreign corporation assignees hold 51% of class grants (30 of 59). Figures describe granted US utility patents in this CPC subclass, not current investment or legal strength.

Leader's share
4.8%

9 of 189 grants

Top three share
10.1%

of the class's recorded grants

Lead over #2
4

more grants than Xiamen ECO Lighting Co. Ltd.

Where H01K sits inside H01

Among 14 subclasses in H01 (Electric Elements), H01K ranks #14 and holds 0.0% 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 H01J 24,482 H01F 21,711 H01H 14,753 H01B 14,745

Rising assignees active in H01K

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. #1 L&L Candle Company, LLC 1.03x 30 → 31 company-wide · 9 in H01K
  2. #2 Xiamen ECO Lighting Co. Ltd. 0.45x 174 → 79 company-wide · 5 in H01K
  3. #3 Seasonal Specialties, LLC 0.28x 32 → 9 company-wide · 5 in H01K

H01K grants by year, peak 2019 (25)

US utility-patent grants per year in H01K, 2015–2025 - recent five years are down 25% versus 2015–2019.

51015202530 20152016201720182019202020212022202320242025 7

Who leads H01K?

The 12 most active assignees in Electric Incandescent Lamps - wider bars mean more grants

patents

What this shows Applied Materials is the most active filer in H01K, holding 15 of the 189 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 H01K
Rank Company Patents in H01K
#1 L&L Candle Company, LLC 9
#2 Xiamen ECO Lighting Co. Ltd. 5
#3 Seasonal Specialties, LLC 5
#4 Ledvance GMBH 4
#5 Toshiba Lighting & Technology Corporation 4
#6 Consumer Lighting (U.S.), LLC 4
#7 Wagic, Inc. 3
#8 Osaka Gas Co., Ltd. 2
#9 Heraeus Noblelight GMBH 2
#10 Micro Mobio Corporation 2
#11 Christmas Northeast, Inc. 2
#12 Trinamix GMBH 1
#13 Advanced Micro-fabrication Equipment Inc. China 1
#14 BJB GmbH & Co. KG 1
#15 Xylem IP Management S. à r.l. 1
#16 Leybold GmBH 1
#17 Si-ware Systems 1
#18 Guangdong Aglaia Optoelectronic Materials Co., Ltd 1
#19 Amerlux, LLC 1
#20 Trojan Technologies 1

Footprint here vs. claim strategy

Each dot is a leading H01K 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 H01K assignees by class footprint. Bubble size = patents in H01K. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 14 data points (bubble-sized by third dimension). 510152025 0246810 Patents in H01K Avg claims / patent (company-wide) L&L CandleXiamen Eco LightingSeasonal SpecialtiesLedvanceToshiba Lighting &…Consumer Lighting (U…WagicOsaka GasHeraeus NoblelightMicro MobioChristmas NortheastTrinamixAdvanced Micro-fabrica…Bjb & Kg
Top 14 H01K assignees by class footprint. Bubble size = patents in H01K. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Questions about H01K

Which company holds the most patents in H01K?
Applied Materials, Inc. leads H01K with 15 patents (4.8% of the subclass). By PatentsView assignee type, foreign corporations account for 51% of class grants.
Which H01K assignees grew fastest recently?
Among assignees with ≥5 grants in H01K, L&L Candle Company, LLC shows the highest company-wide grant multiple (1.03x: 30 grants in 2019–2021 → 31 in 2022–2024) while holding 9 patents in this subclass. Growth is company-wide, not class-only.
How does H01K compare inside parent class H01?
Inside H01 (Electric Elements), H01K ranks #14 of 14 subclasses by grant volume and holds 0.0% of the parent class total. The largest sibling is H01L (165,178 grants).

What to do with this data

H01K in context - here's where to go next.

  • L&L Candle Company, LLC leads H01K with 9 grants in this class. See full portfolio
  • H01K ranks #603 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 - H01K figures are USPTO PatentsView granted-utility totals for this subclass (189 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.