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 grant trajectory.

Compiled by PlainPatent · May 15, 2026

51
US patents granted: #9/9
in B61: 0.6%
B61 class share: +0%
5-yr velocity

The verdict

According to USPTO PatentsView, Shifting Or Shunting Of Rail Vehicles ranks #641 of 670 CPC technology areas - 51 US patents granted since 2015, with recorded grant volume up 0% over five years.

#641
of 670 CPC technology areas: 51
US patents granted, 2015–2025: Transportation Ip Holdings
leading assignee (5): +0%
grant velocity, last 5 yrs

How B61J's grant cadence moved

Between 2020–2024, B61J recorded 22 grants versus 22 in 2015–2019 (+0% equal-window velocity). Across complete years, output peaked in 2015 at 8 grants and bottomed in 2021 at 1 (+700% peak-over-trough). Lead assignee Macton Corporation holds 7.8% of the class ; the top three share 19.6%.

Leaderboard read

B61J concentration, lead at 7.8%

Macton Corporation leads this historical grant record at 7.8% of B61J - us corporation assignees hold 80% of class grants (12 of 15). Figures describe granted US utility patents in this CPC subclass, not current investment or legal strength.

Leader's share: 7.8%
Top three share: 19.6%
Lead over #2: 0

Where B61J sits inside B61

Among 9 subclasses in B61 (Railways), B61J ranks #9 and holds 0.6% of the parent class's 8,123 recorded grants. Sibling chips below are the other subclasses in the same parent class, not the nationwide volume/lead-share peers further down.

B61L 2,671 B61D 1,451 B61B 961 B61C 870 B61F 797 B61K 506 B61H 502 B61G 314

B61J grants by year, peak 2015 (8)

US utility-patent grants per year in B61J, 2015–2025 - recent five years are up 0% versus 2015–2019.

Macton

4
Trackmobile

4
Nordco

2
Mack Rides & Kg

2
Stewart & Stevenson

1
Siemens Vai Metals

1
S of Luxemburg

1

What this shows Transportation Ip… 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.

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

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).

Questions about B61J

Which company holds the most patents in B61J?

Transportation IP Holdings, LLC leads B61J with 5 patents (7.8% of the subclass). By PatentsView assignee type, us corporations account for 80% of class grants.

How does B61J compare inside parent class B61?

Inside B61 (Railways), B61J ranks #9 of 9 subclasses by grant volume and holds 0.6% of the parent class total. The largest sibling is B61L (2,671 grants).

What to do with this data

B61J in context - here's where to go next.

Macton Corporation leads B61J with 4 grants in this class. See full portfolio
B61J ranks #641 of 670 by grant volume among all tracked CPC technology areas. See the ranking
Inside parent class B61, the largest sibling subclass is B61L with 2,671 grants. Explore B61L

Figures reflect USPTO PatentsView grant data through 2026-05-15; pending applications not yet granted are not counted.

Methodology - B61J figures are USPTO PatentsView granted-utility totals for this subclass (51 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.