CPC technology class · B23

B23D - Planing

Planing; slotting; shearing; broaching; sawing; filing; scraping; like operations for working metal by removing material, not otherwise provided for. 2,856 US utility patents granted 2015–2025, with the leading assignees and year-by-year grant trajectory.

Compiled by PlainPatent · May 15, 2026

2,856
US patents granted: #5/9
in B23: 6.0%
B23 class share: -5%
5-yr velocity

The verdict

According to USPTO PatentsView, Planing ranks #325 of 670 CPC technology areas - 2,856 US patents granted since 2015, with recorded grant volume down 5% over five years.

#325
of 670 CPC technology areas: 2,856
US patents granted, 2015–2025: Robert Bosch
leading assignee (212): -5%
grant velocity, last 5 yrs

How B23D's grant cadence moved

Between 2020–2024, B23D recorded 1,211 grants versus 1,271 in 2015–2019 (-5% equal-window velocity). Across complete years, output peaked in 2019 at 325 grants and bottomed in 2016 at 201 (+62% peak-over-trough). Lead assignee Milwaukee Electric Tool Corporation holds 5.5% of the class ; the top three share 14.1%.

Leaderboard read

B23D concentration, lead at 5.5%

Milwaukee Electric Tool Corporation leads this historical grant record at 5.5% of B23D - foreign corporation assignees hold 53% of class grants (872 of 1,653). Figures describe granted US utility patents in this CPC subclass, not current investment or legal strength.

Leader's share: 5.5%
Top three share: 14.1%
Lead over #2: 23

Where B23D sits inside B23

Among 9 subclasses in B23 (Machine TOOLS; Metal-working NOT Otherwise Provided FOR), B23D ranks #5 and holds 6.0% 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 B23Q 5,906 B23B 5,282 B23C 2,322 B23H 839 B23F 529 B23G 283

Rising assignees active in B23D

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 Jessem Tool Corporation 5.00x 1 → 5 company-wide · 6 in B23D
#2 Festool GMBH 4.79x 14 → 67 company-wide · 24 in B23D
#3 Imperial Blades 4.00x 1 → 4 company-wide · 5 in B23D
#4 Techtronic Cordless GP 3.48x 42 → 146 company-wide · 13 in B23D
#5 Seco Tools AB 2.09x 22 → 46 company-wide · 6 in B23D

B23D grants by year, peak 2019 (325)

US utility-patent grants per year in B23D, 2015–2025 - recent five years are down 5% versus 2015–2019.

Milwaukee Electric…

158
Makita

135
Black & Decker

110
Robert Bosch Tool

107
Husqvarna Ab

66
Andreas Stihl & Kg

38
Kennametal

34
Sawstop Holding

34
Koki Holdings

29
Nanjing Chervon…

28
Festool

24
Rexon Industrial

24

What this shows Robert Bosch is the most active filer in B23D, holding 212 of the 2,856 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 B23D
Rank	Company	Patents in B23D
#1	Milwaukee Electric Tool Corporation	158
#2	Makita Corporation	135
#3	Black & Decker Inc.	110
#4	Robert Bosch Tool Corporation	107
#5	Husqvarna AB	66
#6	Andreas Stihl AG & Co. KG	38
#7	Kennametal Inc.	34
#8	SawStop Holding LLC	34
#9	Koki Holdings Co., Ltd.	29
#10	Nanjing Chervon Industry Co., Ltd.	28
#11	Festool GMBH	24
#12	Rexon Industrial Corp., Ltd.	24
#13	Saint-gobain Abrasives, Inc.	19
#14	Saint-gobain Abrasifs	19
#15	Irwin Industrial Tool Company	18
#16	Sumitomo Electric Hardmetal Corp.	17
#17	C. & E. Fein GMBH	17
#18	TTI (MACAO Commercial OFFSHORE) Limited	15
#19	Hitachi Koki Co., Ltd.	15
#20	Amada Co., Ltd.	15

Footprint here vs. claim strategy

Each dot is a leading B23D 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 B23D assignees by class footprint. Bubble size = patents in B23D. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Classes near B23D's 2,856-grant footprint

Nationwide nearest neighbors for B23D (#325 of 670 by volume ; lead share 7.4%) - not the B23 parent-class siblings above.

Nearest by grant volume

F01K 2,854 A63H 2,847 D01D 2,869 A23B 2,807

Nearest by lead-assignee share

F16C 7.4% C23C 7.4% G21D 7.4% B21F 7.5%

Questions about B23D

Which company holds the most patents in B23D?

Robert Bosch GmbH leads B23D with 212 patents (5.5% of the subclass). By PatentsView assignee type, foreign corporations account for 53% of class grants.

Which B23D assignees grew fastest recently?

Among assignees with ≥5 grants in B23D, Jessem Tool Corporation shows the highest company-wide grant multiple (5.00x: 1 grants in 2019–2021 → 5 in 2022–2024) while holding 6 patents in this subclass. Growth is company-wide, not class-only.

How does B23D compare inside parent class B23?

Inside B23 (Machine TOOLS; Metal-working NOT Otherwise Provided FOR), B23D ranks #5 of 9 subclasses by grant volume and holds 6.0% of the parent class total. The largest sibling is B23K (21,060 grants).

What to do with this data

B23D in context - here's where to go next.

Milwaukee Electric Tool Corporation leads B23D with 158 grants in this class. See full portfolio
B23D ranks #325 of 670 by grant volume among all tracked CPC technology areas. See the ranking
Inside parent class B23, the largest sibling subclass is B23K with 21,060 grants. Explore B23K

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

Methodology - B23D figures are USPTO PatentsView granted-utility totals for this subclass (2,856 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.