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 filing trajectory.

238
US patents granted
B27
Parent CPC class
20
Active assignees
+58%
5-yr velocity

The verdict

Dovetailed WORK ranks #591 of 670 CPC technology areas - 238 US patents granted since 2015, with filing up 58% over five years.

#591
of 670 CPC technology areas
238
US patents granted, 2015–2025
Max
leading assignee (37)
+58%
filing velocity, last 5 yrs
Top assignee: Max Co., Ltd. (37 patents)

CPC subclass B27F - DOVETAILED WORK; TENONS; SLOTTING MACHINES FOR WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES - covers 238 US utility patents granted between 2015 and 2025 according to USPTO PatentsView records, within the broader CPC class B27 (WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL). See our CPC classification guide for how the system works.

The competitive landscape in B27F is shaped by 20 distinct companies actively filing in this space. Max Co., Ltd. leads with 37 patents, followed by Valinge Innovation AB at 23 grants and Ceraloc Innovation AB at 10.

Filing activity in B27F is up 58% over the past five years versus 2015-2019, a sharp acceleration suggesting an emerging or fast-moving technology area. All counts come directly from USPTO PatentsView and reflect US granted utility patents only.

Is B27F innovation accelerating?

US utility-patent grants per year in B27F, 2015–2025 - recent five years are up 58% 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

About This Class

CPC subclass B27F belongs to class B27.

238 patents were granted in this class between 2015 and 2025.

20 companies actively patent in this space.

Classification System

Cooperative Patent Classification (CPC) is a hierarchical patent classification system used by the USPTO and EPO.

← All Technology Classes Technology Rankings →

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).

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).

Frequently Asked Questions

What is CPC class B27F?
CPC subclass B27F covers DOVETAILED WORK; TENONS; SLOTTING MACHINES FOR WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES. It belongs to CPC class B27 (WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL), with 238 US utility patents granted since 2015.
How many patents have been filed in B27F?
238 US utility patents were granted in CPC subclass B27F between 2015 and 2025, based on USPTO PatentsView data.
Which company holds the most patents in B27F?
Max Co., Ltd. leads B27F with 37 patents, making it the most active assignee in this technology area.
How is patent data for B27F collected?
Patent data comes from USPTO PatentsView, a public research dataset maintained by the United States Patent and Trademark Office. It covers all US granted utility patents and assigns CPC codes based on the technology described in each patent.
What is the difference between CPC class and subclass?
A CPC class (e.g., B27) is a broad technology category. Subclasses like B27F provide finer granularity within that category. PlainPatent organizes data at the subclass level (4-character codes) for the most useful view of technology domains.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from USPTO PatentsView - official U.S. government patent data. See our methodology for computation details. Retrieved and formatted by PlainPatent Editorial

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.