PlainPatent

CPC technology class · B61

B61J - Shifting OR Shunting OF RAIL Vehicles

Shifting or shunting of rail vehicles. 51 US utility patents granted 2015–2025, with the leading assignees and year-by-year filing trajectory.

51
US patents granted
B61
Parent CPC class
7
Active assignees
+27%
5-yr velocity

The verdict

Shifting OR Shunting OF RAIL Vehicles ranks #641 of 670 CPC technology areas - 51 US patents granted since 2015, with filing up 27% over five years.

#641
of 670 CPC technology areas
51
US patents granted, 2015–2025
Transportation Ip Hol…
leading assignee (5)
+27%
filing velocity, last 5 yrs
Top assignee: Transportation IP Holdings, Llc (5 patents)

CPC subclass B61J - SHIFTING OR SHUNTING OF RAIL VEHICLES - covers 51 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 B61J is shaped by 7 distinct companies actively filing in this space. Transportation IP Holdings, Llc leads with 5 patents, followed by Trackmobile Llc at 4 grants and Nordco Inc. at 2.

Filing activity in B61J is up 27% 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 B61J innovation accelerating?

US utility-patent grants per year in B61J, 2015–2025 - recent five years are up 27% versus 2015–2019.

0246810 20152016201720182019202020212022202320242025 6

Who leads B61J?

The 12 most active assignees in SHIFTING OR SHUNTING OF RAIL VEHICLES - wider bars mean more grants

patents

What this shows Transportation Ip Hol… is the most active filer in B61J, holding 5 of the 51 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 B61J
Rank Company Patents in B61J
#1 Macton Corporation 4
#2 Trackmobile Llc 4
#3 Nordco Inc. 2
#4 MACK Rides Gmbh & Co. KG 2
#5 Stewart & Stevenson Llc 1
#6 Siemens VAI Metals Technologies Gmbh 1
#7 S.a.s. Of Luxemburg, Llc 1

About This Class

CPC subclass B61J belongs to class B61.

51 patents were granted in this class between 2015 and 2025.

7 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 B61J 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 7 B61J assignees by class footprint. Bubble size = patents in B61J. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Top 7 B61J assignees by class footprint. Bubble size = patents in B61J. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 7 data points (bubble-sized by third dimension). 510152025 012345 Patents in B61J Avg claims / patent (company-wide) MactonTrackmobileNordcoMack Rides & KgStewart & StevensonSiemens Vai MetalsS of Luxemburg
Top 7 B61J assignees by class footprint. Bubble size = patents in B61J. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Frequently Asked Questions

What is CPC class B61J?
CPC subclass B61J covers SHIFTING OR SHUNTING OF RAIL VEHICLES. It belongs to CPC class B61 (RAILWAYS), with 51 US utility patents granted since 2015.
How many patents have been filed in B61J?
51 US utility patents were granted in CPC subclass B61J between 2015 and 2025, based on USPTO PatentsView data.
Which company holds the most patents in B61J?
Transportation IP Holdings, Llc leads B61J with 5 patents, making it the most active assignee in this technology area.
How is patent data for B61J 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 B61J 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.