PlainPatent

CPC technology class · B23

B23Q - Details

Details, components, or accessories for machine tools, e.g. arrangements for copying or controlling ; machine tools in general characterised by the construction of particular details or components; combinations or associations of metal-working machines, not directed to a particular result. 5,906 US utility patents granted 2015–2025, with the leading assignees and year-by-year grant trajectory.

5,906
US patents granted
#3/9
in B23
12.4%
B23 class share
+1%
5-yr velocity

The verdict

According to USPTO PatentsView, Details ranks #237 of 670 CPC technology areas - 5,906 US patents granted since 2015, with recorded grant volume up 1% over five years.

#237
of 670 CPC technology areas
5,906
US patents granted, 2015–2025
Fanuc
leading assignee (379)
+1%
grant velocity, last 5 yrs

How B23Q's grant cadence moved

Between 2020–2024, B23Q recorded 2,626 grants versus 2,601 in 2015–2019 (+1% equal-window velocity). Across complete years, output peaked in 2019 at 694 grants and bottomed in 2015 at 422 (+64% peak-over-trough). Lead assignee Fanuc Corporation holds 6.4% of the class ; the top three share 9.5%.

Leaderboard read

B23Q concentration, lead at 6.4%

Fanuc Corporation leads this historical grant record at 6.4% of B23Q - foreign corporation assignees hold 78% of class grants (2,589 of 3,333). Figures describe granted US utility patents in this CPC subclass, not current investment or legal strength.

Leader's share
6.4%

379 of 5,906 grants

Top three share
9.5%

of the class's recorded grants

Lead over #2
286

more grants than Makita Corporation

Where B23Q sits inside B23

Among 9 subclasses in B23 (Machine TOOLS; Metal-working NOT Otherwise Provided FOR), B23Q ranks #3 and holds 12.4% of the parent class's 47,646 recorded grants. Sibling chips below are the other subclasses in the same parent class, not the nationwide volume/lead-share peers further down.

B23K 21,060 B23P 8,569 B23B 5,282 B23D 2,856 B23C 2,322 B23H 839 B23F 529 B23G 283

Rising assignees active in B23Q

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 Trumpf Werkzeugmaschinen SE + Co. KG 27x 0 → 27 company-wide · 8 in B23Q
  2. #2 DN Solutions Co., Ltd. 17x 0 → 17 company-wide · 14 in B23Q
  3. #3 E. Zoller GmbH & Co. KG Einstell-und Messgeraete 10x 1 → 10 company-wide · 7 in B23Q
  4. #4 Chongqing University 9.29x 7 → 65 company-wide · 8 in B23Q
  5. #5 Magswitch Technology, Inc. 8.50x 2 → 17 company-wide · 9 in B23Q

B23Q grants by year, peak 2019 (694)

US utility-patent grants per year in B23Q, 2015–2025 - recent five years are up 1% versus 2015–2019.

300400500600700800 20152016201720182019202020212022202320242025 390

Who leads B23Q?

The 12 most active assignees in Details, Components, OR Accessories FOR Machine Tools, e.g. Arrangements FOR Copying OR Controlling ; Machine Tools IN General Characterised BY THE Construction OF Particular Details OR COMPONENTS; Combinations OR Associations OF Metal-working Machines, NOT Directed TO A Particular Result - wider bars mean more grants

patents

What this shows Fanuc is the most active filer in B23Q, holding 379 of the 5,906 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 B23Q
Rank Company Patents in B23Q
#1 Fanuc Corporation 379
#2 Makita Corporation 93
#3 DMG Mori Co., Ltd. 89
#4 Milwaukee Electric Tool Corporation 86
#5 Okuma Corporation 77
#6 Makino Milling Machine Co., Ltd. 64
#7 Citizen Machinery Co., Ltd. 58
#8 Citizen Watch Co., Ltd. 56
#9 Black & Decker Inc. 50
#10 Disco Corporation 46
#11 Citic Dicastal Co., Ltd. 46
#12 Hilti Aktiengesellschaft 38
#13 Yamazaki Mazak Corporation 35
#14 Jtekt Corporation 31
#15 DMG Mori Seiki Co., Ltd. 29
#16 Deckel Maho Pfronten GmbH 29
#17 Trumpf Werkzeugmaschinen GmbH + Co. KG 28
#18 Robert Bosch Tool Corporation 27
#19 Kosmek Ltd. 26
#20 SMC Corporation 24

Footprint here vs. claim strategy

Each dot is a leading B23Q 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 B23Q assignees by class footprint. Bubble size = patents in B23Q. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 14 data points (bubble-sized by third dimension). 05101520 0100200300400 Patents in B23Q Avg claims / patent (company-wide) FanucMakitaDmg MoriMilwaukee Electric…OkumaMakino Milling MachineCitizen MachineryCitizen WatchBlack & DeckerDiscoCitic DicastalHilti Aktiengesellscha…Yamazaki MazakJtekt
Top 14 B23Q assignees by class footprint. Bubble size = patents in B23Q. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Classes near B23Q's 5,906-grant footprint

Nationwide nearest neighbors for B23Q (#237 of 670 by volume ; lead share 6.4%) - not the B23 parent-class siblings above.

Nearest by grant volume

A01D 5,886 A24F 5,971 H04H 5,838 C30B 5,993

Nearest by lead-assignee share

G16Y 6.4% B81B 6.4% H04N 6.4% F24H 6.4%

Questions about B23Q

Which company holds the most patents in B23Q?
Fanuc Corporation leads B23Q with 379 patents (6.4% of the subclass). By PatentsView assignee type, foreign corporations account for 78% of class grants.
Which B23Q assignees grew fastest recently?
Among assignees with ≥5 grants in B23Q, Trumpf Werkzeugmaschinen SE + Co. KG shows the highest company-wide grant multiple (27x: 0 grants in 2019–2021 → 27 in 2022–2024) while holding 8 patents in this subclass. Growth is company-wide, not class-only.
How does B23Q compare inside parent class B23?
Inside B23 (Machine TOOLS; Metal-working NOT Otherwise Provided FOR), B23Q ranks #3 of 9 subclasses by grant volume and holds 12.4% of the parent class total. The largest sibling is B23K (21,060 grants).

What to do with this data

B23Q 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 - B23Q figures are USPTO PatentsView granted-utility totals for this subclass (5,906 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.