CPC technology class · D01

D01B - Mechanical Treatment Of Natural Fibrous Or Filamentary Ma…

Mechanical treatment of natural fibrous or filamentary material to obtain fibres of filaments, e.g. for spinning. 91 US utility patents granted 2015–2025, with the leading assignees and year-by-year grant trajectory.

Compiled by PlainPatent · May 15, 2026

91
US patents granted: #5/6
in D01: 1.2%
D01 class share: +125%
5-yr velocity

The verdict

According to USPTO PatentsView, Mechanical Treatment Of Natural Fibrous Or Filamentary Ma… ranks #623 of 670 CPC technology areas - 91 US patents granted since 2015, with recorded grant volume up 125% over five years.

#623
of 670 CPC technology areas: 91
US patents granted, 2015–2025: National Agriculture And…
leading assignee (8): +125%
grant velocity, last 5 yrs

How D01B's grant cadence moved

Between 2020–2024, D01B recorded 54 grants versus 24 in 2015–2019 (+125% equal-window velocity). Across complete years, output peaked in 2022 at 15 grants and bottomed in 2016 at 1 (+1400% peak-over-trough). Lead assignee National Agriculture AND Food Research Organization holds 8.8% of the class ; the top three share 19.8%.

Leaderboard read

D01B concentration, lead at 8.8%

National Agriculture AND Food Research Organization leads this historical grant record at 8.8% of D01B - foreign corporation assignees hold 53% of class grants (18 of 34). Figures describe granted US utility patents in this CPC subclass, not current investment or legal strength.

Leader's share: 8.8%
Top three share: 19.8%
Lead over #2: 3

Where D01B sits inside D01

Among 6 subclasses in D01 (Natural OR Man-made Threads OR FIBRES; Spinning), D01B ranks #5 and holds 1.2% of the parent class's 7,563 recorded grants. Sibling chips below are the other subclasses in the same parent class, not the nationwide volume/lead-share peers further down.

D01F 3,867 D01D 2,869 D01H 375 D01G 292 D01C 69

Rising assignees active in D01B

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 C&M Baling Systems, Inc. 2.00x 2 → 4 company-wide · 5 in D01B
#2 National Agriculture AND Food Research Organization 1.60x 10 → 16 company-wide · 8 in D01B
#3 Kowa Company, Ltd. 0.88x 41 → 36 company-wide · 5 in D01B

D01B grants by year, peak 2022 (15)

US utility-patent grants per year in D01B, 2015–2025 - recent five years are up 125% versus 2015–2019.

National Agriculture…

8
Kowa

5
C&M Baling Systems

5
Domtar Paper

3
Westrock Mwv

2
Canon Virginia

1
Profile Products L L C

1
Apdn (B V I)

1
Georama

1
Republic Of Korea(Mana…

1
Mercer International

1
International Centre…

1

What this shows National Agriculture… is the most active filer in D01B, holding 8 of the 91 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 D01B
Rank	Company	Patents in D01B
#1	National Agriculture AND Food Research Organization	8
#2	Kowa Company, Ltd.	5
#3	C&M Baling Systems, Inc.	5
#4	Domtar Paper Company, LLC	3
#5	WestRock MWV, LLC	2
#6	Canon Virginia, Inc.	1
#7	Profile Products L.L.C.	1
#8	Apdn (B.V.I) Inc.	1
#9	Georama, Inc.	1
#10	Republic OF KOREA(MANAGEMENT: Rural Development ADMINISTRATION)	1
#11	Mercer International Inc.	1
#12	International Centre FOR Bamboo AND Rattan	1
#13	Cotton Incorporated	1
#14	Hubei Jinhanjiang Refined Cotton Co., Ltd.	1
#15	Sustainable Composites, LLC	1
#16	Genus Industries, Inc.	1

Footprint here vs. claim strategy

Each dot is a leading D01B 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 D01B assignees by class footprint. Bubble size = patents in D01B. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Questions about D01B

Which company holds the most patents in D01B?

National Agriculture AND Food Research Organization leads D01B with 8 patents (8.8% of the subclass). By PatentsView assignee type, foreign corporations account for 53% of class grants.

Which D01B assignees grew fastest recently?

Among assignees with ≥5 grants in D01B, C&M Baling Systems, Inc. shows the highest company-wide grant multiple (2.00x: 2 grants in 2019–2021 → 4 in 2022–2024) while holding 5 patents in this subclass. Growth is company-wide, not class-only.

How does D01B compare inside parent class D01?

Inside D01 (Natural OR Man-made Threads OR FIBRES; Spinning), D01B ranks #5 of 6 subclasses by grant volume and holds 1.2% of the parent class total. The largest sibling is D01F (3,867 grants).

What to do with this data

D01B in context - here's where to go next.

National Agriculture AND Food Research Organization leads D01B with 8 grants in this class. See full portfolio
D01B ranks #623 of 670 by grant volume among all tracked CPC technology areas. See the ranking
Inside parent class D01, the largest sibling subclass is D01F with 3,867 grants. Explore D01F

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

Methodology - D01B figures are USPTO PatentsView granted-utility totals for this subclass (91 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.