PlainPatent

CPC technology class · B27

B27F - Dovetailed Work

Dovetailed work; tenons; slotting machines for wood or similar material; nailing or stapling machines. 238 US utility patents granted 2015–2025, with the leading assignees and year-by-year grant trajectory.

238
US patents granted
#6/11
in B27
5.7%
B27 class share
+39%
5-yr velocity

The verdict

According to USPTO PatentsView, Dovetailed Work ranks #591 of 670 CPC technology areas - 238 US patents granted since 2015, with recorded grant volume up 39% over five years.

#591
of 670 CPC technology areas
238
US patents granted, 2015–2025
Max
leading assignee (37)
+39%
grant velocity, last 5 yrs

How B27F's grant cadence moved

Between 2020–2024, B27F recorded 124 grants versus 89 in 2015–2019 (+39% equal-window velocity). Across complete years, output peaked in 2020 at 33 grants and bottomed in 2018 at 10 (+230% peak-over-trough). Lead assignee Max Co., Ltd. holds 15.5% of the class ; the top three share 29.4%.

Leaderboard read

B27F concentration, lead at 15.5%

Max Co., Ltd. leads this historical grant record at 15.5% of B27F - foreign corporation assignees hold 76% of class grants (106 of 139). Figures describe granted US utility patents in this CPC subclass, not current investment or legal strength.

Leader's share
15.5%

37 of 238 grants

Top three share
29.4%

of the class's recorded grants

Lead over #2
14

more grants than Valinge Innovation AB

Where B27F sits inside B27

Among 11 subclasses in B27 (Working OR Preserving Wood OR Similar MATERIAL; Nailing OR Stapling Machines IN General), B27F ranks #6 and holds 5.7% 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 B27M 306 B27C 208 B27D 200 B27L 168

Rising assignees active in B27F

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 Woodcraft Solutions LLC 7.00x 1 → 7 company-wide · 6 in B27F
  2. #2 Buildz, LLC 5.00x 0 → 5 company-wide · 5 in B27F
  3. #3 Max Co., Ltd. 1.54x 84 → 129 company-wide · 37 in B27F
  4. #4 Ceraloc Innovation AB 0.60x 38 → 23 company-wide · 10 in B27F
  5. #5 Valinge Innovation AB 0.60x 107 → 64 company-wide · 23 in B27F

B27F grants by year, peak 2020 (33)

US utility-patent grants per year in B27F, 2015–2025 - recent five years are up 39% versus 2015–2019.

010203040 20152016201720182019202020212022202320242025 17

Who leads B27F?

The 12 most active assignees in Dovetailed WORK; TENONS; Slotting Machines FOR Wood OR Similar MATERIAL; Nailing OR Stapling Machines - wider bars mean more grants

patents

What this shows Max is the most active filer in B27F, holding 37 of the 238 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 B27F
Rank Company Patents in B27F
#1 Max Co., Ltd. 37
#2 Valinge Innovation AB 23
#3 Ceraloc Innovation AB 10
#4 Canon Finetech Nisca Inc. 8
#5 Woodcraft Solutions LLC 6
#6 Buildz, LLC 5
#7 House of Design LLC 4
#8 Palletec, LLC 3
#9 Nisca Corporation 2
#10 VÄLINGE Innovation AB 2
#11 Basso Industry Corp. 2
#12 Chep Technology Pty Limited 2
#13 Flexible Steel Lacing Company 2
#14 Canon Finetech Inc. 2
#15 Mitek Holdings, Inc. 2
#16 Kreg Enterprises, Inc. 2
#17 Apex MFG. Co., Ltd. 2
#18 Homag GmbH 2
#19 WorkTools, Inc. 2
#20 Dreadnought, Inc. 2

Footprint here vs. claim strategy

Each dot is a leading B27F 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 B27F assignees by class footprint. Bubble size = patents in B27F. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 14 data points (bubble-sized by third dimension). 01020304050 010203040 Patents in B27F Avg claims / patent (company-wide) MaxValinge Innovation AbCeraloc Innovation AbCanon Finetech NiscaWoodcraft SolutionsBuildzHouse of DesignPalletecNiscaVÄLinge Innovation AbBasso IndustryChep Technology PtyFlexible Steel LacingCanon Finetech
Top 14 B27F assignees by class footprint. Bubble size = patents in B27F. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Questions about B27F

Which company holds the most patents in B27F?
Max Co., Ltd. leads B27F with 37 patents (15.5% of the subclass). By PatentsView assignee type, foreign corporations account for 76% of class grants.
Which B27F assignees grew fastest recently?
Among assignees with ≥5 grants in B27F, Woodcraft Solutions LLC shows the highest company-wide grant multiple (7.00x: 1 grants in 2019–2021 → 7 in 2022–2024) while holding 6 patents in this subclass. Growth is company-wide, not class-only.
How does B27F compare inside parent class B27?
Inside B27 (Working OR Preserving Wood OR Similar MATERIAL; Nailing OR Stapling Machines IN General), B27F ranks #6 of 11 subclasses by grant volume and holds 5.7% of the parent class total. The largest sibling is B27B (1,327 grants).

What to do with this data

B27F 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 - B27F figures are USPTO PatentsView granted-utility totals for this subclass (238 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.