PlainPatent

CPC technology class · B23

B23G - Thread Cutting

Thread cutting; working of screws, bolt heads, or nuts, in conjunction therewith. 283 US utility patents granted 2015–2025, with the leading assignees and year-by-year filing trajectory.

283
US patents granted
B23
Parent CPC class
20
Active assignees
+14%
5-yr velocity

The verdict

Thread Cutting ranks #586 of 670 CPC technology areas - 283 US patents granted since 2015, with filing up 14% over five years.

#586
of 670 CPC technology areas
283
US patents granted, 2015–2025
Osg
leading assignee (15)
+14%
filing velocity, last 5 yrs
Top assignee: OSG Corporation (15 patents)

CPC subclass B23G - THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH - covers 283 US utility patents granted between 2015 and 2025 according to USPTO PatentsView records, within the broader CPC class B23 (MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR). See our CPC classification guide for how the system works.

The competitive landscape in B23G is shaped by 20 distinct companies actively filing in this space. OSG Corporation leads with 15 patents, followed by Emuge-werk Richard Glimpel Gmbh & Co. KG Fabrik FUR Prazisionswerkzeuge at 10 grants and Sumitomo Electric Hardmetal Corp. at 9.

Filing activity in B23G is up 14% over the past five years versus 2015-2019, a relatively steady filing pace. All counts come directly from USPTO PatentsView and reflect US granted utility patents only.

Is B23G innovation accelerating?

US utility-patent grants per year in B23G, 2015–2025 - recent five years are up 14% versus 2015–2019.

10152025303540 20152016201720182019202020212022202320242025 17

Who leads B23G?

The 12 most active assignees in THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH - wider bars mean more grants

patents

What this shows Osg is the most active filer in B23G, holding 15 of the 283 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 B23G
Rank Company Patents in B23G
#1 OSG Corporation 15
#2 Emuge-werk Richard Glimpel Gmbh & Co. KG Fabrik FUR Prazisionswerkzeuge 10
#3 Sumitomo Electric Hardmetal Corp. 9
#4 Citizen Machinery Co., Ltd. 5
#5 HONG ANN TOOL Industries Co., Ltd. 4
#6 Böllhoff Verbindungstechnik Gmbh 4
#7 Hartmetall-werkzeugfabrik Paul Horn Gmbh 4
#8 Ridge Tool Company 3
#9 Wilson TOOL International Inc. 3
#10 Guehring OHG 3
#11 RTG Scientific, Llc 3
#12 Lock-n-stitch, Inc. 3
#13 Ludwig Hettich Holding Gmbh & Co. KG 3
#14 Kamax Holding Gmbh & Co. KG 3
#15 Anvil International, Llc 2
#16 Terydon, Inc. 2
#17 PASS Stanztechnik Ag 2
#18 Tungaloy Corporation 1
#19 Iscar, Ltd. 1
#20 Walter Ag 1

About This Class

CPC subclass B23G belongs to class B23.

283 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 B23G 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 B23G assignees by class footprint. Bubble size = patents in B23G. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Top 14 B23G assignees by class footprint. Bubble size = patents in B23G. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 14 data points (bubble-sized by third dimension). 0510152025 05101520 Patents in B23G Avg claims / patent (company-wide) OsgEmuge-werk Richard Gl…Sumitomo Electric Har…Citizen MachineryHong Ann Tool Industr…Böllhoff Verbindungst…Hartmetall-werkzeugfa…Ridge ToolWilson Tool Internati…Guehring OhgRtg ScientificLock-n-stitchLudwig Hettich Holdin…Kamax Holding & Kg
Top 14 B23G assignees by class footprint. Bubble size = patents in B23G. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Frequently Asked Questions

What is CPC class B23G?
CPC subclass B23G covers THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH. It belongs to CPC class B23 (MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR), with 283 US utility patents granted since 2015.
How many patents have been filed in B23G?
283 US utility patents were granted in CPC subclass B23G between 2015 and 2025, based on USPTO PatentsView data.
Which company holds the most patents in B23G?
OSG Corporation leads B23G with 15 patents, making it the most active assignee in this technology area.
How is patent data for B23G 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., B23) is a broad technology category. Subclasses like B23G 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.