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Run your analysis now →https://www.patsnap.com/resources/blog/rd-blog/aircraft-antiskid-and-brake-control-patent-landscape/ · Patsnap · data cut-off 2026-07-31 · downloaded from the live page
Patent Landscape · Landing Gear & Wheel BrakesAircraft Antiskid and Brake Control Patents: Concentration at the Top
- Five filers hold 60.1% of the field. The top 5 assignees combined account for 1,261 of the 2,098 records in scope — a level of concentration that makes freedom-to-operate checks against those portfolios a first step, not an afterthought.
- Filing peaked in 2021, then fell sharply. Volume ran from 53 records in 2021 down to 19 in 2024, a 64% drop over that three-year span — a genuine pullback, not a publication-lag artefact, since both years are complete.
- Almost all activity sits inside one IPC subclass. B60T (vehicle brakes & braking) covers 92.9% of the 2,098 records, meaning the differentiation battles are being fought inside a single classification, not across scattered ones.
2,098
Published Records
60%
Top-5 Share of All Records
-64%
Filing Growth 2021→2024
JP
Leading Jurisdiction
Filing growth compares 2021 (53 records) with 2024 (19) — 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 2,098 records in scope (CR5), not by the ranked leaders only.
Published byPatsnap Research··7 min readSourced from Patsnap Eureka
Overview
What this landscape covers
This dataset tracks 2,098 published records at the intersection of antiskid control and aircraft brake control, filtered to require both a braking-control concept (antiskid control, anti-skid braking, aircraft brake control) and a specific technical mechanism — wheel speed sensing, slip ratio estimation, locked wheel or touchdown protection, brake pressure modulation, or runway friction estimation. The combination narrows a broad braking-systems corpus down to the control-logic layer that actually decides when and how hard to brake.
The records span 2015 through the 2026 data cut-off, though publication lags filing by roughly 18 months, so the final one to two years understate true filing activity. Most assignees named in the ranking file primarily in the automotive ABS space, with aircraft-specific claims layered on top — a reminder that this field's core control mathematics crosses between road and runway braking.
Filing activity and technology composition, 2015–2026
Source: Patsnap Eureka. Assignee ranking and totals. Derived from a Patsnap search on Aircraft Antiskid and Brake Control covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
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The Data
Filing trends and technology composition
Two views of the same 2,098 records: how filing volume moved year over year, and how the underlying technology splits across IPC subclasses.
A sharp pullback from the 2021 peak
Filings rose to a peak of 53 records in 2021, then declined to 19 by 2024 — a 64% drop across that three-year window. Because 2024 is the most recent year that can be treated as complete, this is a real contraction in filing activity rather than a lag effect; 2025 and 2026 figures will fill in further but should not be read as continuing the same slope yet.
One subclass dominates, several adjacent ones stay thin
B60T (vehicle brakes & braking) touches 92.9% of the 2,098 records, with B64C (aeroplanes & helicopters) at 10.1% and B60W (hybrid/joint vehicle control) at 6.3%. Because a single record can carry several IPC codes, these shares sum to more than 100%; the pattern nonetheless shows that most technical novelty is being claimed inside the core braking-control class rather than in propulsion, steering or engine-control adjacencies.
Shares are the percentage of the 2,098 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Source: Patsnap Eureka. Filing trend and technology composition. Derived from a Patsnap search on Aircraft Antiskid and Brake Control covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.
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The most-cited prior art in this field
Representative Record
US6125318A — Slip ratio antiskid controller using mu/slip ratio generated velocity reference
B. F. GOODRICH COMPANY, THE
An antiskid brake controller utilizes measured wheel speed in order to provide brake control for a vehicle such as an aircraft. The controller estimates the speed of the vehicle via approximation based on the measured wheel speed and a model of the mu-slip ratio curve representing the wheel to running surface friction characteristics. The controller then predicts the slip ratio based on the measured wheel speed and estimated vehicle speed. The difference between the predicted slip ratio and a predefined desired slip ratio is used to drive a modified integral controller segment to achieve maximum obtainable friction.Filed by B. F. Goodrich Company, granted 2000-09-26 — a foundational filing in mu-slip-ratio-based antiskid control still cited across later brake-by-wire and runway friction estimation art.
Highest-citation records
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US5089967A | Auxiliary steering system associated with anti-skid control system for use in motor vehicle | 189 |
| 2 | US6513885B1 | Dual redundant active/active brake-by-wire architecture | 128 |
| 3 | US5918951A | Antiskid brake control system using kalman filtering | 127 |
| 4 | US5050940A | Brake control and anti-skid system | 126 |
| 5 | US6402259B2 | Electromechanical braking system with power distribution and redundancy | 122 |
| 6 | US6220676B1 | Antiskid control of multi-wheel vehicles using coupled and decoupled Kalman filtering incorporating pitch wei… | 115 |
| 7 | US20060108867A1 | Electromechanical braking system with electrical energy back-up and regenerative energy management | 111 |
| 8 | US5237325A | Process and system for gathering and evaluating measured data | 111 |
| 9 | US20010045771A1 | Electromechanical braking system with power distribution and redundancy | 109 |
| 10 | JP1992121260A | Hydraulic brake device | 104 |
Citation counts favour older filings that have had more time to accumulate citations inside this corpus — read them as a signal of influence on the field's terminology and claim structure, not as a ranking of current importance.
Each row carries its publication number; clicking a row searches Eureka by that number.
Source: Patsnap Eureka. Citation counts and representative records. Derived from a Patsnap search on Aircraft Antiskid and Brake Control covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
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What the numbers mean for filing strategy
Three patterns stand out once volume, citations and concentration are read together.
Concentration
60.1%
of 2,098 records held by the top 5 filers
Freedom-to-operate starts with a short list
With the top 5 assignees combined controlling 1,261 of the 2,098 records in scope, and the top 10 reaching 75.4%, a clearance search against a handful of portfolios covers most of the field's claim density. The long tail below tenth place (48 records) thins out quickly.
Based on the 100-company assignee ranking returned by the dataset.
Momentum
53 → 19
records, 2021 peak to 2024
The field has cooled from its 2021 peak
Filing volume fell 64% from the 2021 peak of 53 records to 19 in 2024. Because 2024 is the last complete year in the dataset, this decline reflects a genuine slowdown in new antiskid-control filings rather than a reporting artefact.
2025–2026 figures will rise as publications catch up but should not be extrapolated yet.
Citations
189 citations
on the single most-cited record
Foundational art is decades old
The most-cited records in this corpus, including US5089967A and US6513885B1, date from the 1990s and early 2000s. Their persistence at the top of the citation table shows the core mathematics of slip-ratio and Kalman-filtered antiskid control set the vocabulary that later brake-by-wire and friction-estimation filings still build on.
Citation counts are corpus-internal and favour older filings.
Eureka AI Agent
Looking for what nobody has claimed yet?
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to aircraft antiskid and brake control, with the prior art for and against each one.
Source: Patsnap Eureka. Co-assignee relationships and derived observations. Derived from a Patsnap search on Aircraft Antiskid and Brake Control covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
Players
Who holds the claim density
The ranking returned by the dataset covers 100 companies, counted by patent family. It is not a top-50 or top-100 list in the industry sense — it is the full set the data endpoint returns for this search.
Leader
360 records
held by the top-ranked assignee
One filer well ahead of the rest
The leading assignee holds 360 records, more than four times the fifth-place total of 78. That gap, rather than a close race at the top, is the defining shape of this ranking.
Counted in patent families across the 100-company ranking.
Mid-field
78 → 48
records from fifth to tenth place
A steep drop after the leader, then a plateau
Fifth place holds 78 records and tenth place 48 — a much gentler slope than the drop from first to fifth. Recent-year momentum data shows several of the largest historical filers, across both automotive-ABS and aerospace-brake lines, recording zero filings in the latest year, consistent with the field-wide 2021–2024 pullback.
Momentum reflects the most recent year in the dataset, which is still filling in.
Co-filing
10 pairs
of assignees sharing filings
Co-assignment is rare and concentrated
Only 10 co-assignee pairs appear in the dataset, and the strongest of them link a parent automaker with its in-house brake and electronics suppliers. That pattern points to vertically integrated development rather than cross-company joint filing as the norm in this field.
Based on paired-assignee records across the full corpus.
Recent-year filing momentum by assignee
| Assignee | Recent year | YoY |
|---|---|---|
| Nissan Motor Co., Ltd. | 0 | — |
| B.F. Goodrich Company | 0 | -100% |
| Denso Corporation | 0 | — |
| Toyota Motor Corporation | 0 | — |
| Toyota Motor Corporation | 0 | — |
| Hydro-Aire, Inc. | 0 | — |
| NIPPON ABS | 0 | — |
| Fujitsu Ten Limited | 0 | — |
Source: Patsnap Eureka. Assignee-level momentum. Derived from a Patsnap search on Aircraft Antiskid and Brake Control covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
What's Next
Where to take this analysis
The dataset points to a field with dense core claims and thinner adjacent branches. Two directions follow naturally.
Map claims against the top 5 filers directly
With 60.1% of records held by five assignees, a clause-by-clause comparison against their granted claims is the fastest way to find out whether a proposed filing sits in clear space or on top of existing art.
Explore assignee portfolios in EurekaWatch the under-claimed branches for movement
Runway friction estimation and brake-by-wire redundancy carry far fewer records than the core slip-ratio control claims. A filing there today faces a shallower prior-art field, but that can change quickly once one filer moves.
Track white space with EurekaSource: Patsnap Eureka. Forward-looking reading of the same dataset. Derived from a Patsnap search on Aircraft Antiskid and Brake Control covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
FAQ
Common questions about this landscape
The assignee ranking for this field is led by one company with 360 records, well ahead of fifth place at 78. The top 5 assignees combined hold 1,261 of the 2,098 records in scope, or 60.1%, and the top 10 extend that to 75.4%. Most of the leading filers are automotive suppliers and OEMs whose ABS control patents extend into aircraft-specific antiskid claims, rather than aerospace-only specialists, reflecting how much of the underlying slip-ratio and wheel-speed-sensing mathematics is shared between road and runway braking.
Filing volume peaked in 2021 at 53 records and fell to 19 by 2024, a 64% decline over that three-year span. Because 2024 is the most recent year that can be treated as complete in this dataset, that drop reflects a real pullback rather than a publication-lag effect. Figures for 2025 and 2026 will rise as filings work through the roughly 18-month publication lag, but there is no evidence yet that they will reverse the downward trend seen through 2024.
US6125318A, assigned to B. F. Goodrich, claims an antiskid brake controller that estimates vehicle speed from measured wheel speed and a mu-slip-ratio model, then drives a modified integral controller to track a target slip ratio. It is a foundational filing in slip-ratio-based antiskid control, granted in 2000, and its citation count reflects continued influence on later brake-by-wire and friction-estimation art. Anyone filing new antiskid control claims built around slip-ratio estimation from wheel speed should review its claim scope closely, though two decades of subsequent filings mean it is one reference point among many rather than the sole barrier.
Relative to the dense core of B60T vehicle-braking claims, which touch 92.9% of the 2,098 records in scope, adjacent branches such as runway friction estimation under variable surface contamination, brake-by-wire redundancy architectures and locked-wheel protection for electric taxi systems carry far fewer filings. That does not mean these areas are technically immature — high filing density elsewhere means claim space is occupied, not that thinner areas are unsolved — but it does mean a new filing there faces a shallower prior-art field today.
Ownership is highly concentrated at the top and then flattens. The leading assignee alone holds 360 of the 2,098 records, more than four times the fifth-place total of 78, and the top 5 combined account for 60.1% of all records in scope. Below tenth place, at 48 records, the ranking spreads across a long tail of smaller filers, so most competitive and freedom-to-operate attention should focus on the handful of firms at the top rather than the full 100-company ranking.
Answers are grounded in the same dataset. Derived from a Patsnap search on Aircraft Antiskid and Brake Control covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
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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.