PlainPatent

CPC technology class · B61

B61G - Couplings

Couplings; draught and buffing appliances. 314 US utility patents granted 2015–2025, with the leading assignees and year-by-year filing trajectory.

314
US patents granted
B61
Parent CPC class
20
Active assignees
+28%
5-yr velocity

The verdict

Couplings ranks #579 of 670 CPC technology areas - 314 US patents granted since 2015, with filing up 28% over five years.

#579
of 670 CPC technology areas
314
US patents granted, 2015–2025
Pennsy
leading assignee (19)
+28%
filing velocity, last 5 yrs
Top assignee: Pennsy Corporation (19 patents)

CPC subclass B61G - COUPLINGS; DRAUGHT AND BUFFING APPLIANCES - covers 314 US utility patents granted between 2015 and 2025 according to USPTO PatentsView records, within the broader CPC class B61 (RAILWAYS). See our CPC classification guide for how the system works.

The competitive landscape in B61G is shaped by 20 distinct companies actively filing in this space. Pennsy Corporation leads with 19 patents, followed by Voith Patent Gmbh at 18 grants and Dellner Couplers AB at 14.

Filing activity in B61G is up 28% over the past five years versus 2015-2019, a sharp acceleration suggesting an emerging or fast-moving technology area. All counts come directly from USPTO PatentsView and reflect US granted utility patents only.

Is B61G innovation accelerating?

US utility-patent grants per year in B61G, 2015–2025 - recent five years are up 28% versus 2015–2019.

152025303540 20152016201720182019202020212022202320242025 24

Who leads B61G?

The 12 most active assignees in COUPLINGS; DRAUGHT AND BUFFING APPLIANCES - wider bars mean more grants

patents

What this shows Pennsy is the most active filer in B61G, holding 19 of the 314 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 B61G
Rank Company Patents in B61G
#1 Pennsy Corporation 19
#2 Voith Patent Gmbh 18
#3 Dellner Couplers AB 14
#4 Bedloe Industries Llc 11
#5 Amsted Rail Company, Inc. 10
#6 Miner Enterprises, Inc. 9
#7 CRRC Qingdao Sifang Co., Ltd. 7
#8 Strato, Inc. 7
#9 TTX Company 7
#10 CRRC Qingdao Sifang Rolling Stock Research Institute Co., Ltd. 6
#11 Mcconway & Torley, Llc 6
#12 Harting Electric Gmbh & Co. KG 4
#13 Wabtec Holding Corp. 4
#14 A. Stucki Company 4
#15 CRRC Qiqihar Rolling Stock Co., Ltd. 4
#16 Ireco, Llc 4
#17 Axtone Spolka Akcyjna 4
#18 New York Air Brake Llc 3
#19 Siemens Mobility Austria Gmbh 3
#20 Parallel Systems, Inc. 3

About This Class

CPC subclass B61G belongs to class B61.

314 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 B61G 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 B61G assignees by class footprint. Bubble size = patents in B61G. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Top 14 B61G assignees by class footprint. Bubble size = patents in B61G. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 14 data points (bubble-sized by third dimension). 101520253035 05101520 Patents in B61G Avg claims / patent (company-wide) PennsyVoith PatentDellner Couplers AbBedloe IndustriesAmsted RailMiner EnterprisesCrrc Qingdao SifangStratoTtxCrrc Qingdao Sifang R…Mcconway & TorleyHarting Electric & KgWabtec HoldingA Stucki
Top 14 B61G assignees by class footprint. Bubble size = patents in B61G. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Frequently Asked Questions

What is CPC class B61G?
CPC subclass B61G covers COUPLINGS; DRAUGHT AND BUFFING APPLIANCES. It belongs to CPC class B61 (RAILWAYS), with 314 US utility patents granted since 2015.
How many patents have been filed in B61G?
314 US utility patents were granted in CPC subclass B61G between 2015 and 2025, based on USPTO PatentsView data.
Which company holds the most patents in B61G?
Pennsy Corporation leads B61G with 19 patents, making it the most active assignee in this technology area.
How is patent data for B61G 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., B61) is a broad technology category. Subclasses like B61G 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.