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 grant trajectory.

283
US patents granted
#9/9
in B23
0.6%
B23 class share
+0%
5-yr velocity

The verdict

According to USPTO PatentsView, Thread Cutting ranks #586 of 670 CPC technology areas - 283 US patents granted since 2015, with recorded grant volume up 0% over five years.

#586
of 670 CPC technology areas
283
US patents granted, 2015–2025
Osg
leading assignee (15)
+0%
grant velocity, last 5 yrs

How B23G's grant cadence moved

Between 2020–2024, B23G recorded 125 grants versus 125 in 2015–2019 (+0% equal-window velocity). Across complete years, output peaked in 2020 at 36 grants and bottomed in 2024 at 15 (+140% peak-over-trough). Lead assignee OSG Corporation holds 5.3% of the class ; the top three share 12.0%.

Leaderboard read

B23G concentration, lead at 5.3%

OSG Corporation leads this historical grant record at 5.3% of B23G - foreign corporation assignees hold 79% of class grants (80 of 101). Figures describe granted US utility patents in this CPC subclass, not current investment or legal strength.

Leader's share
5.3%

15 of 283 grants

Top three share
12.0%

of the class's recorded grants

Lead over #2
5

more grants than Emuge-werk Richard Glimpel GMBH & Co. KG Fabrik FUR Prazisionswerkzeuge

Where B23G sits inside B23

Among 9 subclasses in B23 (Machine TOOLS; Metal-working NOT Otherwise Provided FOR), B23G ranks #9 and holds 0.6% 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 B23D 2,856 B23C 2,322 B23H 839 B23F 529

Rising assignees active in B23G

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 Sumitomo Electric Hardmetal Corp. 1.06x 136 → 144 company-wide · 9 in B23G
  2. #2 OSG Corporation 0.83x 24 → 20 company-wide · 15 in B23G
  3. #3 Citizen Machinery Co., Ltd. 0.72x 25 → 18 company-wide · 5 in B23G
  4. #4 Emuge-werk Richard Glimpel GMBH & Co. KG Fabrik FUR Prazisionswerkzeuge 0.60x 5 → 3 company-wide · 10 in B23G

B23G grants by year, peak 2020 (36)

US utility-patent grants per year in B23G, 2015–2025 - recent five years are up 0% 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

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). Scatter plot of 14 data points (bubble-sized by third dimension). 0510152025 05101520 Patents in B23G Avg claims / patent (company-wide) OsgEmuge-werk Richard…Sumitomo Electric…Citizen MachineryHong Ann Tool…Böllhoff Verbindungste…Hartmetall-werkzeugfab…Ridge ToolWilson Tool Internatio…Guehring OhgRtg ScientificLock-n-stitchLudwig Hettich…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).

Questions about B23G

Which company holds the most patents in B23G?
OSG Corporation leads B23G with 15 patents (5.3% of the subclass). By PatentsView assignee type, foreign corporations account for 79% of class grants.
Which B23G assignees grew fastest recently?
Among assignees with ≥5 grants in B23G, Sumitomo Electric Hardmetal Corp. shows the highest company-wide grant multiple (1.06x: 136 grants in 2019–2021 → 144 in 2022–2024) while holding 9 patents in this subclass. Growth is company-wide, not class-only.
How does B23G compare inside parent class B23?
Inside B23 (Machine TOOLS; Metal-working NOT Otherwise Provided FOR), B23G ranks #9 of 9 subclasses by grant volume and holds 0.6% of the parent class total. The largest sibling is B23K (21,060 grants).

What to do with this data

B23G 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 - B23G figures are USPTO PatentsView granted-utility totals for this subclass (283 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.