Positive Train Control HMI Patents: Who Leads, Where Gaps Sit 2026
- Filing has cooled since a 2017 peak of 11 records, with the 2022 midpoint down to 4 and no clear rebound through the most recent filing years.
- B61L railway traffic control dominates the IPC mix at 114 of 134 records, while G09B educational/demonstration aids (21) and G06Q business data processing (25) show the interface work is entangled with training and scheduling claims, not display hardware alone.
- Every named assignee in the recent-year momentum table shows zero activity in the latest year, suggesting the active-filer set has either gone quiet or shifted the work into unpublished or differently classified filings.
What this landscape covers
Positive Train Control (PTC) human-machine interface patents cover the onboard systems that let a locomotive engineer see, confirm and act on speed, braking and authority information generated by a train control system. This search combines PTC and train-control-system terminology with cab display, engineer interface and onboard HMI language, isolating the subset of PTC patent activity that touches the human side of the system rather than the back-end enforcement logic alone. The dataset spans 134 patent families published between 2015 and mid-2026.
The technology sits at the intersection of railway signalling regulation and cab electronics: US federal PTC mandates drove much of the underlying filing activity, and the interface layer inherited both the scheduling logic from older train-control patents and newer training/simulation claims aimed at engineer certification.
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Filing trend and technology mix
The filing curve and IPC breakdown together show a technology that peaked early, driven by regulatory deadlines, and has since diffused into adjacent classification codes rather than sustaining a dedicated HMI filing push.
A 2017 peak with no sustained follow-through
Filings hit their high point in 2017 at 11 records, a period consistent with the run-up to US PTC implementation deadlines. By the 2022 midpoint, annual filings had fallen to 4, and the trend through to the 2026 cut-off shows no recovery. Because publication lags filing by roughly 18 months, the final one or two years in this window will always look thinner than they eventually turn out to be, but the multi-year decline predates that lag effect.
B61L dominates; G09B and G06Q signal interface work bleeding into training and scheduling
B61L (railway traffic control) covers 114 of the 134 records, confirming that HMI claims are overwhelmingly filed as railway-signalling subject matter rather than as generic display or UI patents. G06Q (25 records) and G09B (21 records) point to a meaningful secondary cluster around scheduling logic and engineer training/simulation aids, while G06F, H04W, F01K, B60T and F01D each carry single-digit-to-low-double-digit counts, indicating the interface layer touches wireless telemetry, braking coordination and even thermal/turbine subsystems only incidentally.
Shares are the percentage of the 134 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Positive Train Control Human-Machine Interface with Eureka
This page is one run against one query. Ask Eureka your own question about positive train control human-machine interface and every answer comes back with the patent numbers behind it.
Try EurekaKey patents and citation anchors
Method and System of Leveraging Onboard Positive Train Control Equipment
A system of a leading locomotive with a reduced complement of onboard Positive Train Control (PTC) equipment leveraging a full complement of PTC equipment in a trailing locomotive, while operating in a PTC territory. The system can be applied to a push-pull passenger train, wherein the cab car has the reduced complement of onboard PTC equipment and the locomotive has the full complement, whereby the train is operable in both directions in a PTC territory. The system can also serve as an expedient repair of a leading locomotive with failed onboard PTC equipment by leveraging the functional PTC equipment in another locomotive in the consist.Filed by HOWARD, JOHN EDWARD, published 2020-09-24 as US20200298896A1.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US5623413A | Scheduling system and method | 374 |
| 2 | US5794172A | Scheduling system and method | 258 |
| 3 | US6154735A | Resource scheduler for scheduling railway train resources | 195 |
| 4 | US20040010432A1 | Automatic train control system and method | 168 |
| 5 | US20040034556A1 | Scheduling system and method | 129 |
| 6 | US20040111309A1 | Resource schedule for scheduling rail way train resources | 86 |
| 7 | US9283945B1 | Braking systems and methods of determining a safety factor for a braking model for a train | 74 |
| 8 | US20040093245A1 | System and method for scheduling and train control | 73 |
| 9 | US20050234757A1 | System and method for scheduling and train control | 70 |
| 10 | US7539624B2 | Automatic train control system and method | 62 |
Citation counts favour older filings simply because they have had more years to accumulate citations within the searched corpus; treat this table as a map of foundational influence, not of current filing activity.
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 stand out once the filing trend, classification mix and citation anchors are read together: an early, regulation-driven filing wave; a secondary interface cluster hidden inside training and scheduling codes; and a citation structure still dominated by pre-mandate scheduling patents.
The mandate-driven wave has passed
Filing peaked in 2017, the period aligned with US federal PTC rollout deadlines, and has declined toward zero since. This is consistent with a technology whose core claim space was staked out ahead of a compliance deadline rather than one still undergoing active innovation cycles.
HMI claims are filed as signalling, not UI
The overwhelming concentration in B61L means most interface patents are drafted and examined as railway traffic control subject matter. A filer targeting the display or interaction layer specifically should expect prior art search and examination to run through signalling art, not general HMI or UX patent classes.
Scheduling patents still anchor the field
The most-cited records in this corpus are scheduling-system patents from the mid-1990s, cited hundreds of times each. Their continued citation weight shows how much of the modern PTC HMI stack still traces its lineage to train-scheduling logic rather than to display-specific invention.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to positive train control human-machine interface, with the prior art for and against each one.
Who filed, and who has gone quiet
The assignee set includes major rail-equipment suppliers, a Class I railroad, and rolling-stock and braking-technology specialists, but the recent-year momentum table shows every one of them recording zero filings in the latest year, a pattern rare enough to note explicitly rather than assume it reflects only publication lag.
A quiet field across the board
Assignees spanning braking-technology, signalling and rolling-stock backgrounds all show zero recorded filings in the most recent year. Given publication lag this may partly reflect filings not yet public, but the multi-year decline visible in the trend data suggests a genuine slowdown rather than a reporting artefact alone.
Operator-side filing alongside suppliers
At least one Class I railroad appears in the assignee set alongside equipment suppliers, indicating that operators themselves have patented aspects of PTC HMI deployment rather than relying solely on vendor-side IP. This is consistent with operational retrofit patents like the leading/trailing locomotive equipment-sharing approach in the representative filing.
Pre-mandate scheduling patents still dominate influence
The heaviest-cited records predate the PTC mandate era and cover train scheduling and resource allocation rather than the cab display itself. Any new HMI filing that touches automated scheduling logic should expect to be examined against this older, heavily-cited scheduling art.
| Assignee | Recent year | YoY |
|---|---|---|
| Harsco Corporation | 0 | — |
| Westinghouse Air Brake Technologies Corporation (Wabtec) | 0 | — |
| BNSF Railway Company | 0 | — |
| Siemens AG | 0 | — |
| General Electric Company | 0 | — |
| Siemens Mobility GmbH (Germany) | 0 | — |
| Deuta-Werke GmbH | 0 | — |
| SIEMENS MOBILITY INC | 0 | — |
Where to take this analysis
This landscape identifies the classification structure and filing pattern; deciding whether to file, license or design around requires drilling into specific claim sets.
Run a freedom-to-operate check on the B61L cluster
With 114 of 134 records sitting in railway traffic control classification, a targeted claim-chart comparison against active B61L families is the fastest way to see what specific display or alert mechanisms remain open.
Explore B61L claims in EurekaMap the training/simulation sub-cluster separately
The G09B records suggest engineer training and certification tools are patented somewhat independently of the core display hardware; treating them as a separate freedom-to-operate question can avoid overbroad conclusions from the B61L data alone.
Trace G09B filings in EurekaCommon questions on PTC HMI patents
It is a patent that covers the onboard system through which a locomotive engineer receives and acts on information generated by a Positive Train Control system, such as cab displays, alert interfaces, or engineer confirmation controls. This dataset isolates that subset by combining PTC and train-control-system search terms with cab display, engineer interface and onboard HMI language. Most such patents are classified under B61L, the railway traffic control IPC subclass, rather than under general user-interface classes, because examiners treat the interface as part of the signalling system rather than as standalone display technology.
The 2017 peak of 11 filings in this dataset lines up with the run-up to US federal PTC implementation deadlines, which pushed railroads and suppliers to file protective and operational patents ahead of mandated deployment. Filing activity declined toward the 2022 midpoint of 4 records and has not recovered since. This pattern is typical of regulation-driven filing waves: once the compliance deadline passes and core architectures are locked in, the incentive to file new interface patents drops sharply.
The recent-year momentum data in this dataset shows every tracked assignee, including major rail-equipment suppliers, a Class I railroad and braking-technology specialists, recording zero filings in the latest year. That does not necessarily mean the field is abandoned; publication typically lags actual filing by around 18 months, so very recent activity may not yet be visible. But the multi-year downward trend suggests the slowdown is real rather than purely a reporting artefact.
The IPC composition points to several thinner branches worth checking before filing: wireless telemetry integration with the cab interface (H04W, 9 records), braking-coordination alerts (B60T, 5 records), and engineer training or simulation interfaces (G09B, 21 records) sit well below the dominant B61L signalling cluster. A first claim in one of these areas would likely combine a specific sensor or data input with a defined display or alert behaviour, rather than claiming the display generically, since the dense B61L art already covers broad signalling-display combinations.
US20200298896A1 covers a specific architecture in which a leading locomotive with reduced onboard PTC equipment leverages the full PTC equipment complement in a trailing locomotive, including a push-pull configuration where the cab car carries the reduced equipment. It also covers using this leveraging as an expedient repair method when a leading locomotive's PTC equipment fails. Anyone designing a multi-locomotive consist that shares PTC functionality across units in a similar leading-trailing arrangement should review this claim scope closely, but architectures that do not rely on this specific equipment-sharing and repair logic are likely to sit outside it.
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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.