CPC technology class · B27

B27G - Accessory Machines Or Apparatus For Working Wood Or Simil…

Accessory machines or apparatus for working wood or similar materials; tools for working wood or similar materials ; safety devices for wood working machines or tools. 503 US utility patents granted 2015–2025, with the leading assignees and year-by-year grant trajectory.

Compiled by PlainPatent · May 15, 2026

503
US patents granted: #3/11
in B27: 12.1%
B27 class share: +11%
5-yr velocity

The verdict

According to USPTO PatentsView, Accessory Machines Or Apparatus For Working Wood Or Simil… ranks #543 of 670 CPC technology areas - 503 US patents granted since 2015, with recorded grant volume up 11% over five years.

#543
of 670 CPC technology areas: 503
US patents granted, 2015–2025: Robert Bosch
leading assignee (66): +11%
grant velocity, last 5 yrs

How B27G's grant cadence moved

Between 2020–2024, B27G recorded 214 grants versus 192 in 2015–2019 (+11% equal-window velocity). Across complete years, output peaked in 2018 at 51 grants and bottomed in 2016 at 27 (+89% peak-over-trough). Lead assignee Robert Bosch Tool Corporation holds 8.9% of the class ; the top three share 17.7%.

Leaderboard read

B27G concentration, lead at 8.9%

Robert Bosch Tool Corporation leads this historical grant record at 8.9% of B27G - us corporation assignees hold 60% of class grants (131 of 218). Figures describe granted US utility patents in this CPC subclass, not current investment or legal strength.

Leader's share: 8.9%
Top three share: 17.7%
Lead over #2: 21

Where B27G sits inside B27

Among 11 subclasses in B27 (Working OR Preserving Wood OR Similar MATERIAL; Nailing OR Stapling Machines IN General), B27G ranks #3 and holds 12.1% 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 B27K 387 B27M 306 B27F 238 B27C 208 B27D 200 B27L 168

Rising assignees active in B27G

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 · 5 in B27G
#2 Festool GMBH 4.79x 14 → 67 company-wide · 20 in B27G
#3 Woodpeckers, LLC 2.15x 34 → 73 company-wide · 6 in B27G
#4 Ledermann GmbH & Co. KG 2.00x 1 → 2 company-wide · 6 in B27G
#5 JPL Global, LLC 1.20x 5 → 6 company-wide · 5 in B27G

B27G grants by year, peak 2018 (51)

US utility-patent grants per year in B27G, 2015–2025 - recent five years are up 11% versus 2015–2019.

Robert Bosch Tool

45
Sawstop Holding

24
Festool

20
Valinge Innovation Ab

13
Woodpeckers

6
Usnr

6
Rexon Industrial

6
Ledermann & Kg

6
VÄLinge Innovation Ab

5
Kreg Enterprises

5
Jpl Global

5
Sd3

5

What this shows Robert Bosch is the most active filer in B27G, holding 66 of the 503 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 B27G
Rank	Company	Patents in B27G
#1	Robert Bosch Tool Corporation	45
#2	SawStop Holding LLC	24
#3	Festool GMBH	20
#4	Valinge Innovation AB	13
#5	Woodpeckers, LLC	6
#6	Usnr, LLC	6
#7	Rexon Industrial Corp., Ltd.	6
#8	Ledermann GmbH & Co. KG	6
#9	VÄLINGE Innovation AB	5
#10	Kreg Enterprises, Inc.	5
#11	JPL Global, LLC	5
#12	SD3, LLC	5
#13	Ridge Tool Company	4
#14	Power Box AG	4
#15	Green Manufacturing, Inc.	3
#16	Jessem Tool Corporation	3
#17	Sears Brands, L.L.C.	2
#18	Germans Boada, S.A.	2
#19	Homag GmbH	2
#20	Affinity Tool Works, LLC	2

Footprint here vs. claim strategy

Each dot is a leading B27G 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 B27G assignees by class footprint. Bubble size = patents in B27G. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Classes near B27G's 503-grant footprint

Nationwide nearest neighbors for B27G (#543 of 670 by volume ; lead share 13.1%) - not the B27 parent-class siblings above.

Nearest by grant volume

B61H 502 B61K 506 C12C 506 B28C 511

Nearest by lead-assignee share

F02D 13.1% B64C 13.2% G04B 13.0% E02F 13.3%

Questions about B27G

Which company holds the most patents in B27G?

Robert Bosch GmbH leads B27G with 66 patents (8.9% of the subclass). By PatentsView assignee type, us corporations account for 60% of class grants.

Which B27G assignees grew fastest recently?

Among assignees with ≥5 grants in B27G, VÄLINGE Innovation AB shows the highest company-wide grant multiple (47x: 0 grants in 2019–2021 → 47 in 2022–2024) while holding 5 patents in this subclass. Growth is company-wide, not class-only.

How does B27G compare inside parent class B27?

Inside B27 (Working OR Preserving Wood OR Similar MATERIAL; Nailing OR Stapling Machines IN General), B27G ranks #3 of 11 subclasses by grant volume and holds 12.1% of the parent class total. The largest sibling is B27B (1,327 grants).

What to do with this data

B27G in context - here's where to go next.

Robert Bosch Tool Corporation leads B27G with 45 grants in this class. See full portfolio
B27G ranks #543 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 - B27G figures are USPTO PatentsView granted-utility totals for this subclass (503 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.