CPC technology class · B27

B27M - Working Of Wood Not Provided For In Subclasses B27b - B27l

Working of wood not provided for in subclasses b27b - b27l; manufacture of specific wooden articles. 306 US utility patents granted 2015–2025, with the leading assignees and year-by-year grant trajectory.

Compiled by PlainPatent · May 15, 2026

306
US patents granted: #5/11
in B27: 7.4%
B27 class share: +61%
5-yr velocity

The verdict

According to USPTO PatentsView, Working Of Wood Not Provided For In Subclasses B27b - B27l ranks #582 of 670 CPC technology areas - 306 US patents granted since 2015, with recorded grant volume up 61% over five years.

#582
of 670 CPC technology areas: 306
US patents granted, 2015–2025: Valinge Innovation Ab
leading assignee (32): +61%
grant velocity, last 5 yrs

How B27M's grant cadence moved

Between 2020–2024, B27M recorded 169 grants versus 105 in 2015–2019 (+61% equal-window velocity). Across complete years, output peaked in 2022 at 39 grants and bottomed in 2015 at 14 (+179% peak-over-trough). Lead assignee Valinge Innovation AB holds 10.5% of the class ; the top three share 16.3%.

Leaderboard read

B27M concentration, lead at 10.5%

Valinge Innovation AB leads this historical grant record at 10.5% of B27M - foreign corporation assignees hold 60% of class grants (97 of 163). Figures describe granted US utility patents in this CPC subclass, not current investment or legal strength.

Leader's share: 10.5%
Top three share: 16.3%
Lead over #2: 22

Where B27M sits inside B27

Among 11 subclasses in B27 (Working OR Preserving Wood OR Similar MATERIAL; Nailing OR Stapling Machines IN General), B27M ranks #5 and holds 7.4% of the parent class's 4,149 recorded grants. Sibling chips below are the other subclasses in the same parent class, not the nationwide volume/lead-share peers further down.

B27B 1,327 B27N 750 B27G 503 B27K 387 B27F 238 B27C 208 B27D 200 B27L 168

Rising assignees active in B27M

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 VÄLINGE Innovation AB 47x 0 → 47 company-wide · 8 in B27M
#2 Unilin BV 6.11x 9 → 55 company-wide · 8 in B27M
#3 Buildz, LLC 5.00x 0 → 5 company-wide · 5 in B27M
#4 Glowforge Inc. 2.36x 11 → 26 company-wide · 10 in B27M
#5 Delcotto IP, LLC 2.00x 1 → 2 company-wide · 6 in B27M

B27M grants by year, peak 2022 (39)

US utility-patent grants per year in B27M, 2015–2025 - recent five years are up 61% versus 2015–2019.

Valinge Innovation Ab

32
Glowforge

10
Masonite

8
Unilin Bv

8
VÄLinge Innovation Ab

8
Usnr

7
Unilin Bvba

7
Homag

6
Delcotto Ip

6
Flooring Industies…

5
Ceraloc Innovation Ab

5
Michael Weinig

5

What this shows Valinge Innovation Ab is the most active filer in B27M, holding 32 of the 306 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 B27M
Rank	Company	Patents in B27M
#1	Valinge Innovation AB	32
#2	Glowforge Inc.	10
#3	Masonite Corporation	8
#4	Unilin BV	8
#5	VÄLINGE Innovation AB	8
#6	Usnr, LLC	7
#7	Unilin Bvba	7
#8	Homag GmbH	6
#9	Delcotto IP, LLC	6
#10	Flooring Industies Limited, Sarl	5
#11	Ceraloc Innovation AB	5
#12	Michael Weinig AG	5
#13	Buildz, LLC	5
#14	American Woodmark Management Company	3
#15	Palletec, LLC	3
#16	Thermwood Corporation	2
#17	Chep Technology Pty Limited	2
#18	Kreg Enterprises, Inc.	2
#19	RSI Home Products Management, Inc.	2
#20	International Centre FOR Bamboo AND Rattan	2

Footprint here vs. claim strategy

Each dot is a leading B27M 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 B27M assignees by class footprint. Bubble size = patents in B27M. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Questions about B27M

Which company holds the most patents in B27M?

Valinge Innovation AB leads B27M with 32 patents (10.5% of the subclass). By PatentsView assignee type, foreign corporations account for 60% of class grants.

Which B27M assignees grew fastest recently?

Among assignees with ≥5 grants in B27M, VÄLINGE Innovation AB shows the highest company-wide grant multiple (47x: 0 grants in 2019–2021 → 47 in 2022–2024) while holding 8 patents in this subclass. Growth is company-wide, not class-only.

How does B27M compare inside parent class B27?

Inside B27 (Working OR Preserving Wood OR Similar MATERIAL; Nailing OR Stapling Machines IN General), B27M ranks #5 of 11 subclasses by grant volume and holds 7.4% of the parent class total. The largest sibling is B27B (1,327 grants).

What to do with this data

B27M in context - here's where to go next.

Valinge Innovation AB leads B27M with 32 grants in this class. See full portfolio
B27M ranks #582 of 670 by grant volume among all tracked CPC technology areas. See the ranking
Inside parent class B27, the largest sibling subclass is B27B with 1,327 grants. Explore B27B

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

Methodology - B27M figures are USPTO PatentsView granted-utility totals for this subclass (306 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.