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CPC technology class · E06

E06C - Ladders

Ladders. 653 US utility patents granted 2015–2025, with the leading assignees and year-by-year grant trajectory.

653
US patents granted
#2/2
in E06
8.1%
E06 class share
+0%
5-yr velocity

The verdict

According to USPTO PatentsView, Ladders ranks #512 of 670 CPC technology areas - 653 US patents granted since 2015, with recorded grant volume up 0% over five years.

#512
of 670 CPC technology areas
653
US patents granted, 2015–2025
Werner
leading assignee (59)
+0%
grant velocity, last 5 yrs

How E06C's grant cadence moved

Between 2020–2024, E06C recorded 297 grants versus 297 in 2015–2019 (+0% equal-window velocity). Across complete years, output peaked in 2020 at 86 grants and bottomed in 2015 at 43 (+100% peak-over-trough). Lead assignee Werner Co. holds 9.0% of the class ; the top three share 21.1%.

Leaderboard read

E06C concentration, lead at 9.0%

Werner Co. leads this historical grant record at 9.0% of E06C - us corporation assignees hold 82% of class grants (315 of 384). Figures describe granted US utility patents in this CPC subclass, not current investment or legal strength.

Leader's share
9.0%

59 of 653 grants

Top three share
21.1%

of the class's recorded grants

Lead over #2
15

more grants than Oshkosh Corporation

Where E06C sits inside E06

Among 2 subclasses in E06 (Doors, Windows, Shutters, OR Roller Blinds IN GENERAL; Ladders), E06C ranks #2 and holds 8.1% of the parent class's 8,051 recorded grants. Sibling chips below are the other subclasses in the same parent class, not the nationwide volume/lead-share peers further down.

E06B 7,398

Rising assignees active in E06C

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 Ardisam, Inc. 14x 1 → 14 company-wide · 5 in E06C
  2. #2 Little Giant Ladder Systems, LLC 4.00x 7 → 28 company-wide · 24 in E06C
  3. #3 Dorel Home Furnishings, Inc. 3.00x 2 → 6 company-wide · 5 in E06C
  4. #4 HBTek, Inc. 3.00x 1 → 3 company-wide · 5 in E06C
  5. #5 Oshkosh Corporation 2.23x 130 → 290 company-wide · 44 in E06C

E06C grants by year, peak 2020 (86)

US utility-patent grants per year in E06C, 2015–2025 - recent five years are up 0% versus 2015–2019.

405060708090 20152016201720182019202020212022202320242025 54

Who leads E06C?

The 12 most active assignees in Ladders - wider bars mean more grants

patents

What this shows Werner is the most active filer in E06C, holding 59 of the 653 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 E06C
Rank Company Patents in E06C
#1 Werner Co. 59
#2 Oshkosh Corporation 44
#3 Wing Enterprises, Incorporated 35
#4 Little Giant Ladder Systems, LLC 24
#5 Iveco Magirus AG 12
#6 New-Tec Integration (Xiamen) Co., Ltd. 10
#7 Tricam Industries, LLC 9
#8 Core Distribution, Inc. 9
#9 Panduit Corp. 8
#10 Louisville Ladder Inc. 7
#11 Altec Industries, Inc. 6
#12 Safe Rack LLC 6
#13 Ardisam, Inc. 5
#14 Dorel Home Furnishings, Inc. 5
#15 HBTek, Inc. 5
#16 Lampe Holding B.V. 5
#17 Blue Moon Designs, LLC 5
#18 Intex Marketing Ltd. 4
#19 Polygroup Macau Limited (BVI) 4
#20 Tie Down, Inc. 4

Footprint here vs. claim strategy

Each dot is a leading E06C 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 E06C assignees by class footprint. Bubble size = patents in E06C. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 14 data points (bubble-sized by third dimension). 510152025 020406080 Patents in E06C Avg claims / patent (company-wide) WernerOshkoshWing Enterprises…Little Giant Ladder…Iveco MagirusNew-tec Integration…Tricam IndustriesCore DistributionPanduitLouisville LadderAltec IndustriesSafe RackArdisamDorel Home Furnishings
Top 14 E06C assignees by class footprint. Bubble size = patents in E06C. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Classes near E06C's 653-grant footprint

Nationwide nearest neighbors for E06C (#512 of 670 by volume ; lead share 9.0%) - not the E06 parent-class siblings above.

Nearest by grant volume

A01J 653 B03B 658 H03J 659 E21F 641

Nearest by lead-assignee share

G07F 9.0% B43K 9.1% B61C 9.1% D07B 9.1%

Questions about E06C

Which company holds the most patents in E06C?
Werner Co. leads E06C with 59 patents (9.0% of the subclass). By PatentsView assignee type, us corporations account for 82% of class grants.
Which E06C assignees grew fastest recently?
Among assignees with ≥5 grants in E06C, Ardisam, Inc. shows the highest company-wide grant multiple (14x: 1 grants in 2019–2021 → 14 in 2022–2024) while holding 5 patents in this subclass. Growth is company-wide, not class-only.
How does E06C compare inside parent class E06?
Inside E06 (Doors, Windows, Shutters, OR Roller Blinds IN GENERAL; Ladders), E06C ranks #2 of 2 subclasses by grant volume and holds 8.1% of the parent class total. The largest sibling is E06B (7,398 grants).

What to do with this data

E06C in context - here's where to go next.

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

Methodology - E06C figures are USPTO PatentsView granted-utility totals for this subclass (653 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.