CPC technology class · D02

D02G - Crimping Or Curling Fibres

Crimping or curling fibres, filaments, threads, or yarns; yarns or threads. 1,439 US utility patents granted 2015–2025, with the leading assignees and year-by-year grant trajectory.

Compiled by PlainPatent · May 15, 2026

1,439
US patents granted: #1/3
in D02: 78.0%
D02 class share: +41%
5-yr velocity

The verdict

According to USPTO PatentsView, Crimping Or Curling Fibres ranks #410 of 670 CPC technology areas - 1,439 US patents granted since 2015, with recorded grant volume up 41% over five years.

#410
of 670 CPC technology areas: 1,439
US patents granted, 2015–2025: The Board of Regents of the…
leading assignee (30): +41%
grant velocity, last 5 yrs

How D02G's grant cadence moved

Between 2020–2024, D02G recorded 734 grants versus 519 in 2015–2019 (+41% equal-window velocity). Across complete years, output peaked in 2024 at 176 grants and bottomed in 2015 at 62 (+184% peak-over-trough). Lead assignee Kolon Industries, Inc. holds 1.9% of the class ; the top three share 4.4%.

Leaderboard read

D02G concentration, lead at 1.9%

Kolon Industries, Inc. leads this historical grant record at 1.9% of D02G - foreign corporation assignees hold 61% of class grants (331 of 539). Figures describe granted US utility patents in this CPC subclass, not current investment or legal strength.

Leader's share: 1.9%
Top three share: 4.4%
Lead over #2: 10

Where D02G sits inside D02

Among 3 subclasses in D02 (YARNS; Mechanical Finishing OF Yarns OR ROPES; Warping OR Beaming), D02G ranks #1 and holds 78.0% of the parent class's 1,845 recorded grants. Sibling chips below are the other subclasses in the same parent class, not the nationwide volume/lead-share peers further down.

D02J 369 D02H 37

Rising assignees active in D02G

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 Avient Protective Materials B.V. 9.00x 0 → 9 company-wide · 5 in D02G
#2 Natural Fiber Welding, Inc. 2.80x 5 → 14 company-wide · 5 in D02G
#3 Mpusa, LLC 2.50x 2 → 5 company-wide · 5 in D02G
#4 Mitsuboshi Belting Ltd. 1.60x 25 → 40 company-wide · 9 in D02G
#5 Nanocomp Technologies Inc. 1.50x 6 → 9 company-wide · 5 in D02G

D02G grants by year, peak 2024 (176)

US utility-patent grants per year in D02G, 2015–2025 - recent five years are up 41% versus 2015–2019.

Kolon Industries

28
Sanko Tekstil…

18
Aladdin Manufacturing

17
Oerlikon Textile & Kg

16
Invista North America…

14
Tepha

13
Southern Mills

13
Bekaert

12
Lintec Of America

12
Welspun India

11
Mitsuboshi Belting

9
Teijin Frontier

8

What this shows The Board of Regents… is the most active filer in D02G, holding 30 of the 1,439 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 D02G
Rank	Company	Patents in D02G
#1	Kolon Industries, Inc.	28
#2	Sanko Tekstil Isletmeleri San. Ve Tic. A.S.	18
#3	Aladdin Manufacturing Corporation	17
#4	Oerlikon Textile GmbH & Co. KG	16
#5	Invista North America S.a.r.l.	14
#6	Tepha, Inc.	13
#7	Southern Mills, Inc.	13
#8	NV Bekaert SA	12
#9	Lintec OF America, Inc.	12
#10	Welspun India Limited	11
#11	Mitsuboshi Belting Ltd.	9
#12	Teijin Frontier Co., Ltd.	8
#13	Kordsa Teknik Tekstil Anonim Sirketi	8
#14	Spinnova OY	8
#15	Bando Chemical Industries, Ltd.	7
#16	Federal-Mogul Powertrain LLC	7
#17	Dupont Safety & Construction, Inc.	7
#18	Continental Reifen Deutschland GmbH	6
#19	Jiangsu Hengli Chemical Fibre Co., Ltd.	6
#20	Teijin Aramid B.V.	5

Footprint here vs. claim strategy

Each dot is a leading D02G 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 D02G assignees by class footprint. Bubble size = patents in D02G. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Classes near D02G's 1,439-grant footprint

Nationwide nearest neighbors for D02G (#410 of 670 by volume ; lead share 2.1%) - not the D02 parent-class siblings above.

Nearest by grant volume

B07B 1,431 B65F 1,429 B61D 1,451 D21C 1,427

Nearest by lead-assignee share

A61J 2.1% Y04S 2.1% A23L 2.1% B01J 2.1%

Questions about D02G

Which company holds the most patents in D02G?

The Board of Regents of the University of Texas System leads D02G with 30 patents (1.9% of the subclass). By PatentsView assignee type, foreign corporations account for 61% of class grants.

Which D02G assignees grew fastest recently?

Among assignees with ≥5 grants in D02G, Avient Protective Materials B.V. shows the highest company-wide grant multiple (9.00x: 0 grants in 2019–2021 → 9 in 2022–2024) while holding 5 patents in this subclass. Growth is company-wide, not class-only.

How does D02G compare inside parent class D02?

Inside D02 (YARNS; Mechanical Finishing OF Yarns OR ROPES; Warping OR Beaming), D02G ranks #1 of 3 subclasses by grant volume and holds 78.0% of the parent class total. The largest sibling is D02J (369 grants).

What to do with this data

D02G in context - here's where to go next.

Kolon Industries, Inc. leads D02G with 28 grants in this class. See full portfolio
D02G ranks #410 of 670 by grant volume among all tracked CPC technology areas. See the ranking
Inside parent class D02, the largest sibling subclass is D02J with 369 grants. Explore D02J

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

Methodology - D02G figures are USPTO PatentsView granted-utility totals for this subclass (1,439 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.