CBTC Patents: Who Leads, Where the Gaps Are 2026
- 34.4% concentration. The top five assignees alone account for 595 of the 1,731 records in scope — a field where a handful of rail-signaling incumbents already occupy the densest ground.
- Filing pulled back -58% from 2021 to 2024. The complete-year trend runs from 149 filings in 2021 to 62 in 2024; 2025-26 figures are still filling in under the usual 18-month publication lag.
- B61L dominates at 70.7%. Railway traffic control claims sit under more than two-thirds of all records, while wireless and positioning classes remain comparatively open.
Filing growth compares 2021 (149 records) with 2024 (62) — a three-year span. 2024 is the most recent year we treat as complete: publication lags filing by roughly 18 months, so 2025 onwards are still filling in and any growth rate that ends there would understate the field. Top-5 share is the combined record count of the five largest assignees divided by all 1,731 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
Communications-based train control, or CBTC, replaces fixed trackside signaling with continuous digital communication between trains and wayside equipment to determine position, speed and separation. The patent activity captured here spans 2015 to mid-2026 and covers 1,731 published records indexed against CBTC, wireless train control, railway signaling and rail safety terms across major filing offices. The set mixes core signaling control logic (B61L) with the wireless and positioning layers (H04W, H04B, G01S) that make communications-based operation possible.
Filing offices show United States, EPO and China as the three largest receiving jurisdictions, with India, WIPO/PCT and Japan following. That spread points to a technology being filed defensively across major rail procurement markets rather than concentrated in a single home jurisdiction.
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Filing trend and technology composition
The two views below separate timing from subject matter: when CBTC-related patents were filed, and which technical layers they claim against.
Filing trend, 2017-2026
Filings ran from 119 in 2017 to a peak of 162 in 2020, then eased to 62 by 2024, the last year with a complete publication window. The drop from 149 filings in 2021 to 62 in 2024 (-58%) reads as a real pullback in new filings during that stretch, not a change in dataset scope. Years after 2024 will keep rising as later-filed applications publish.
Technology composition by IPC subclass
B61L (railway traffic control) appears on 70.7% of the 1,731 records, confirming that most activity still targets core control logic. H04W wireless networks (16.9%) and H04L digital transmission (8.0%) are the next densest layers, with G01S positioning (4.1%) and G05D non-electric control (2.7%) comparatively thin — each record can carry multiple classes, so these figures do not sum to 100%.
Shares are the percentage of the 1,731 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Signaling & Train Control — Communications-Based Train Control Patent Landscape with Eureka
This page is one run against one query. Ask Eureka your own question about signaling & train control — communications-based train control patent landscape and every answer comes back with the patent numbers behind it.
Try EurekaRepresentative filing and most-cited prior art
GB2480568A — Wireless train control system, on-board and trackside wireless train control system (Hitachi)
Filed to close a gap where a train crosses from a zone unprotected by the wireless train control system into a covered zone. The solution adds a ground device to the uncovered zone that broadcasts the distance to the zone boundary; the train carries a detector and an on-board communicator that starts communication once that boundary signal is received.Abstract condensed from the original filing text.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US4041283A | Railway train control simulator and method | 188 |
| 2 | CN107284471A | 一种基于车车通信的CBTC系统 | 130 |
| 3 | US4853883A | Apparatus and method for use in simulating operation and control of a railway train | 125 |
| 4 | US20130334373A1 | Method for detecting the extent of clear, intact track near a railway vehicle | 109 |
| 5 | US20100299007A1 | Method & apparatus for hybrid train control device | 91 |
| 6 | US20110172856A1 | Short Headway Communications Based Train Control System | 90 |
| 7 | US20150232110A1 | Method & apparatus for a train control system | 88 |
| 8 | CN102566442A | CBTC信号系统仿真测试平台 | 88 |
| 9 | US6694231B1 | Train registry overlay system | 84 |
| 10 | CN106741013A | 车载系统、CBTC控制系统与CTCS控制系统切换的控制方法 | 83 |
Citation counts reward older filings that have had more time to accumulate citations within the searched corpus — read them as a signal of influence on later filings, not as a ranking of current commercial relevance.
Patent titles are shown in the language they were filed in, not translated, so that each record stays verifiable against the original filing — a translated title will not match in Eureka or in any national register. Each row carries its publication number; clicking a row searches Eureka by that number.
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Browse MCP servers →What the numbers mean for a filing decision
Three patterns run through this dataset that matter more than any single ranking: where claim density already sits, how filing pace has moved, and where citation weight concentrates.
The top of the field is dense
Five assignees hold 595 of the 1,731 records in scope, and the top ten hold 852 (49.2%). New entrants filing core train-to-wayside control claims are filing into ground several incumbents already occupy.
Volume peaked in 2020, then pulled back
Filings ran from 149 in 2021 down to 62 in 2024, after a 2020 peak of 162. That is a real slowdown across complete-year data; 2025 and 2026 figures will rise as the publication lag closes.
Core control logic still dominates filings
Railway traffic control claims (B61L) sit on more than two-thirds of records, while wireless (H04W, 16.9%) and positioning (G01S, 4.1%) layers that CBTC depends on carry proportionally fewer filings.
Influence skews toward older simulator patents
The most-cited record in this set is a train control simulator filing, followed by other pre-2015 foundational work. High citation counts here mark historical influence on the field, not which claims are commercially live today.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to signaling & train control — communications-based train control patent landscape, with the prior art for and against each one.
Who is filing, and where the activity has cooled
The ranked leaders span Japanese, Chinese, European and North American rail-signaling suppliers, with momentum data showing most named leaders at zero filings in the latest year — consistent with the broader 2021-2024 pullback rather than any single company exiting the space.
One filer sits well ahead of the field
The top-ranked assignee holds 280 records, more than four times the fifth-place holder's 65. That gap is unusually wide for this category and signals a company treating CBTC control logic as core defensive territory.
Recent-year filings have dropped to near zero for named leaders
Several of the most active historical assignees show zero filings in the latest tracked year, with some recording a -100% year-on-year change. Given the 18-month publication lag, this reflects incomplete recent data as much as reduced activity.
Co-filing is rare and concentrated
Only ten co-assignee pairs appear in this dataset, and the strongest pair — a parent and its European R&D arm — outweighs the rest, with the next strongest pairs tied to a single transport-technology group and its holding company.
| Assignee | Recent year | YoY |
|---|---|---|
| Siemens Mobility GmbH | 1 | — |
| Mitsubishi Electric Corporation | 0 | -100% |
| Thales Canada Inc. | 0 | — |
| Casco Signal Ltd. | 0 | -100% |
| Nippon Signal Co., Ltd. | 0 | — |
| Traffic Control Technology Co., Ltd. | 0 | -100% |
| Hitachi, Ltd. | 0 | — |
| GHALY NABIL N | 0 | — |
Where to take this next
The data points to where claim space is dense, where it has thinned, and where the next filing decision actually gets made.
Map a specific claim against the leader's portfolio
With one assignee holding 280 of 1,731 records, checking a draft claim against that portfolio first avoids the densest overlap before broader searching.
Run a claim comparison in Eureka →Track the under-claimed positioning and G05D branches
G01S positioning (4.1%) and G05D control (2.7%) carry the lowest record shares among the tracked IPC classes — worth a closer look before assuming they are crowded.
Explore white space in Eureka →Watch for the 2025-26 filing rebound as data completes
Because publication lags filing by about 18 months, the apparent 2024 pullback will fill in over the next reporting cycles; re-check momentum once later years complete.
Set up trend alerts in Eureka →Common questions about CBTC patents
One assignee leads the ranked field with 280 of the 1,731 records in scope, well ahead of the fifth-ranked holder at 65 and tenth-ranked at 41. The top five assignees combined account for 34.4% of all records, and the top ten for 49.2%. That concentration means a large share of core train-to-wayside control logic already sits with a small number of established rail-signaling suppliers, so new filers should expect to search around that territory rather than into open ground.
Complete-year data shows filings falling from 149 in 2021 to 62 in 2024, a 58% drop over that span, after a peak of 162 filings in 2020. That is a genuine pullback across the years that have fully published. However, because publication typically lags filing by about 18 months, 2025 and 2026 figures are still incomplete and should not yet be read as a continuation of the decline.
Railway traffic control (IPC class B61L) appears on 70.7% of the 1,731 records in this landscape, making it by far the densest claim area. Wireless communication networks (H04W, 16.9%) and digital information transmission (H04L, 8.0%) are the next most common, reflecting the communication layer CBTC depends on. Positioning and non-electric control classes such as G01S and G05D appear on far fewer records, at 4.1% and 2.7% respectively.
Among receiving offices in this dataset, the United States leads with 460 records, followed by the European Patent Office at 267 and China at 232. India (126), the WIPO/PCT route (119) and Japan (98) follow behind. The spread across major rail procurement markets suggests filers are protecting CBTC technology in the jurisdictions where large transit and mainline rail projects are being tendered, rather than concentrating filings in a single home market.
GB2480568A, assigned to Hitachi, addresses a specific gap case: a train moving from a zone not covered by wireless train control into a zone that is covered. Its claims centre on a ground device in the uncovered zone that transmits boundary-distance information, paired with an on-board detector and communicator that initiates communication on receiving that signal. It blocks that particular boundary-handoff mechanism, not wireless train control generally, so a design that handles zone transitions through a different signalling method would sit outside its claim scope.
The technology composition data shows G01S (positioning, 4.1%), G05D (non-electric control variables, 2.7%) and H04B (general transmission, 7.2%) carrying much lower record shares than core B61L control logic at 70.7%. That gap does not guarantee the space is legally open, but it does indicate fewer filed claims to search around in areas like train-to-train relative positioning or hybrid transmission fallback methods, compared with the heavily filed traffic-control core.
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Disclaimer. This page is generated from Patsnap Eureka data drawn from a limited snapshot of global patent and scientific-literature records, and is provided for general information and reference only.
Patent data carries inherent limitations: recent filings (typically the most recent 18–24 months) are under-counted due to standard publication lag; counts may be reported at either a patent-family or a patent-record basis and are not always directly comparable; classification, applicant-name, and citation data may contain errors, duplicates, or omissions; and the underlying search query defines and constrains the scope shown. As a result, the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
Nothing on this page constitutes an exhaustive prior-art, novelty, freedom-to-operate, or validity search, nor does it constitute legal, financial, investment, or professional advice, and it should not be relied upon as such. Any patent, commercial, or strategic decision should be verified independently and reviewed with qualified patent, legal, and domain professionals. Patsnap makes no warranties, express or implied, as to the accuracy, completeness, or fitness for any particular purpose of the information presented.
Machine translation. Assignee and organisation names originally recorded in Chinese, Japanese or Korean have been rendered into English by an AI translation step so that the tables stay readable. These renderings are best-effort and may not match a company’s registered English name; the original name is what the underlying patent record carries, and it is what any Eureka query launched from this page uses.