PlainPatent

CPC technology class · B24

B24D - Tools FOR Grinding

Tools for grinding, buffing or sharpening. 2,145 US utility patents granted 2015–2025, with the leading assignees and year-by-year filing trajectory.

2,145
US patents granted
B24
Parent CPC class
20
Active assignees
-29%
5-yr velocity

The verdict

Tools FOR Grinding ranks #361 of 670 CPC technology areas - 2,145 US patents granted since 2015, with filing down 29% over five years.

#361
of 670 CPC technology areas
2,145
US patents granted, 2015–2025
3m Innovative Propert…
leading assignee (204)
-29%
filing velocity, last 5 yrs
Top assignee: 3M Innovative Properties Company (204 patents)

CPC subclass B24D - TOOLS FOR GRINDING, BUFFING OR SHARPENING - covers 2,145 US utility patents granted between 2015 and 2025 according to USPTO PatentsView records, within the broader CPC class B24 (GRINDING; POLISHING). See our CPC classification guide for how the system works.

The competitive landscape in B24D is shaped by 20 distinct companies actively filing in this space. 3M Innovative Properties Company leads with 204 patents, followed by Saint-gobain Abrasifs at 167 grants and US Synthetic Corporation at 161.

Filing activity in B24D is down 29% over the past five years versus 2015-2019, a notable slowdown that may signal a maturing field. All counts come directly from USPTO PatentsView and reflect US granted utility patents only.

Is B24D innovation accelerating?

US utility-patent grants per year in B24D, 2015–2025 - recent five years are down 29% versus 2015–2019.

50100150200250 20152016201720182019202020212022202320242025 95

Who leads B24D?

The 12 most active assignees in TOOLS FOR GRINDING, BUFFING OR SHARPENING - wider bars mean more grants

patents

What this shows 3m Innovative Propert… is the most active filer in B24D, holding 204 of the 2,145 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 B24D
Rank Company Patents in B24D
#1 Saint-gobain Abrasives, Inc. 172
#2 Saint-gobain Abrasifs 167
#3 US Synthetic Corporation 161
#4 Baker Hughes Holdings Llc 124
#5 Smith International, Inc. 41
#6 Diamond Innovations, Inc. 39
#7 Rohm And Haas Electronic Materials CMP Holdings, Inc. 30
#8 Element Six Limited 28
#9 Disco Corporation 27
#10 Saint-gobain Ceramics & Plastics, Inc. 26
#11 Baker Hughes, A GE Company, Llc 25
#12 Element SIX Abrasives S.a. 18
#13 Darex, Llc 14
#14 Nexplanar Corporation 14
#15 SK Enpulse Co., Ltd. 11
#16 Taimei Chemicals Co., Ltd. 11
#17 Xebec Technology Co., Ltd. 11
#18 Kinik Company 10
#19 National Oilwell DHT, L.p. 9
#20 IV Technologies Co., Ltd 9

About This Class

CPC subclass B24D belongs to class B24.

2,145 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 B24D 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 B24D assignees by class footprint. Bubble size = patents in B24D. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Top 14 B24D assignees by class footprint. Bubble size = patents in B24D. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 14 data points (bubble-sized by third dimension). 510152025 050100150200 Patents in B24D Avg claims / patent (company-wide) Saint-gobain AbrasivesSaint-gobain AbrasifsUs SyntheticBaker Hughes HoldingsSmith InternationalDiamond InnovationsRohm and Haas Materia…Element SixDiscoSaint-gobain Ceramics…Baker Hughes a GeElement Six AbrasivesDarexNexplanar
Top 14 B24D assignees by class footprint. Bubble size = patents in B24D. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Frequently Asked Questions

What is CPC class B24D?
CPC subclass B24D covers TOOLS FOR GRINDING, BUFFING OR SHARPENING. It belongs to CPC class B24 (GRINDING; POLISHING), with 2,145 US utility patents granted since 2015.
How many patents have been filed in B24D?
2,145 US utility patents were granted in CPC subclass B24D between 2015 and 2025, based on USPTO PatentsView data.
Which company holds the most patents in B24D?
3M Innovative Properties Company leads B24D with 204 patents, making it the most active assignee in this technology area.
How is patent data for B24D 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., B24) is a broad technology category. Subclasses like B24D 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.