Datalink Communication for ATC Patents: Leaders & Filing Trends 2026
- Filing peaked in 2020 at 5 records, then activity fell away sharply — 2021 to 2024 shows a documented -100% change, though 2025-26 figures are still filling in as publication catches up.
- One assignee leads with 10 records, against a long tail where the fifth and tenth-ranked companies each hold a single filing — this is a field with one dominant filer and little contest beneath it.
- 85.0% of records sit in G08G (traffic control systems), while adjacent classes like G08B signalling and alarm systems cover just 5.0% of the 20 records in scope.
Filing growth compares 2021 (1 records) with 2024 (0) — 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.
What this landscape covers
This landscape covers patent filings that combine controller-pilot datalink communication (CPDLC) and related aeronautical datalink mechanisms with operational concerns such as message latency, uplink integrity, clearance uplink handling, channel congestion and satellite link continuity. The scope is narrow by design: it captures technical solutions to keeping ATC-to-cockpit messaging reliable and timely, not general air traffic management software.
The dataset spans 20 published records filed between 2015 and 2026, with United States and European (EPO) receiving offices accounting for most of the activity. Because publication trails filing by roughly 18 months, the most recent one to two years understate real filing volume and should be read as provisional.
Filing trend and technology mix
Two views of the same 20-record dataset: how filing activity has moved year over year, and which IPC subclasses carry the technical weight.
Filing trend: a sharp rise-and-fall pattern
Filings built toward a peak of 5 records in 2020, the high point of the entire window. The documented change from 2021 (1 record) to 2024 (0 records) is a -100% swing over three years — a real contraction in a field that was already small, not a rounding artefact. Years after 2024 are not yet complete in the data and should not be read as a continuation of decline.
Technology composition: concentrated in traffic control systems
G08G (traffic control systems) appears in 85.0% of the 20 records in scope, making it by far the dominant classification. G01C (navigation) and G06F (digital data processing) each cover 15.0% of records, with B64D (aircraft equipment), G05D (control of non-electric variables), H04B (transmission) and H04L (digital information transmission) each around 10.0%. Because records can carry multiple IPC codes, these shares add up to more than 100% — they describe overlap, not a partition of the field.
Shares are the percentage of the 20 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Datalink Communication for Air Traffic Control with Eureka
This page is one run against one query. Ask Eureka your own question about datalink communication for air traffic control and every answer comes back with the patent numbers behind it.
Try EurekaMost-cited records and a representative filing
Systems and methods for reducing controller-pilot rejection ratios (US20210233412A1)
This Honeywell filing addresses a concrete operational problem: CPDLC requests that get rejected by ATC waste time and add radio-frequency load. The system takes a pilot's tentative CPDLC request together with live traffic, navigation and sensor data, predicts whether ATC will accept it, estimates the likely delay if it does, and offers alternative requests with their own predicted delay times when acceptance looks unlikely.Filed 2021-07-29, published as US20210233412A1.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | WO2002099769A1 | Air traffic management system and method | 111 |
| 2 | US20080154486A1 | Method of creating and updating an ATC flight plan in real time to take account of flight directives and imp… | 60 |
| 3 | US20210090445A1 | Advisory method and system for flight trajectory optimization | 21 |
| 4 | US8849476B2 | Method of creating and updating an ATC flight plan in real time to take account of flight directives and impl… | 21 |
| 5 | US20190244528A1 | Methods and systems for mitigating clearance ambiguities | 19 |
| 6 | US11146329B1 | Systems and methods for multilink aircraft communication | 12 |
| 7 | US20150161896A1 | System and method for tactical viewing of datalink messages | 8 |
| 8 | US9293050B2 | System and method for tactical viewing of datalink messages | 5 |
| 9 | US20140344467A1 | Loadable flexible protocol profiles | 5 |
| 10 | US20210233412A1 | Systems and methods for reducing controller-pilot rejection ratios | 4 |
Citation counts favour older filings simply because they have had longer to accumulate citations inside this corpus — treat them as a signal of influence, not of current relevance.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Three patterns stand out once filing volume, timing and technology mix are read together.
One filer, then a long tail
The leading assignee holds 10 records in a ranking of 25 companies, while the fifth and tenth-ranked entrants each hold just one. That gap suggests most of the field's institutional knowledge sits with a single organisation rather than being contested across several.
A short filing window, not a steady build
Activity did not climb gradually — it peaked at 5 records in 2020 and then fell to the documented -100% change between 2021 and 2024. That pattern is more consistent with a burst of R&D response to a specific operational or regulatory trigger than with an emerging technology still gathering momentum.
Claim space is dense in one subclass
G08G (traffic control systems) dominates the classification mix at 85.0% of records, while H04L (digital information transmission) and H04B (transmission) sit at only 10.0% each. A new filer targeting the messaging-and-transport layer, rather than the traffic-control logic layer, faces noticeably less occupied claim space.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to datalink communication for air traffic control, with the prior art for and against each one.
Who holds the filings
The assignee ranking spans 25 companies, from an established aerospace-avionics leader down to individual named inventors holding single filings. Co-assignee pairings are sparse — 10 pairs total, each appearing once — indicating this is largely a field of solo filers rather than joint ventures.
Established avionics manufacturer sets the pace
The leading assignee's 10 records outnumber the next several ranked entrants combined, reflecting a long-running avionics and flight-management product line rather than a recent entrant testing the space.
Most filers appear once
Beyond the leader, the ranking thins quickly: the fifth-placed and tenth-placed assignees each hold a single record. This is typical of a niche technical area where large aerospace suppliers and individual named inventors both appear, but rarely more than once each.
No assignee shows recent-year filing activity
Every tracked assignee, including the field leader, shows zero filings in the latest year of this dataset. Given the roughly 18-month publication lag, this likely reflects incomplete recent data rather than an actual halt in R&D, but it means momentum cannot currently be attributed to any single company.
| Assignee | Recent year | YoY |
|---|---|---|
| Honeywell International Inc. | 0 | — |
| Honeywell Aerospace SAS | 0 | — |
| Thales SA | 0 | — |
| Rockwell Collins Inc. | 0 | — |
| The Boeing Company | 0 | — |
| WURDACK RICHARD L | 0 | — |
| WOOD GARY H | 0 | — |
| WARREN ANTHONY W | 0 | — |
Where to take this analysis
The dataset points to specific next steps depending on whether the goal is freedom-to-operate, competitive tracking or new filing strategy.
Map the G08G claim boundaries in detail
With 85.0% of records classed under G08G, a claim-by-claim review of the leader's portfolio in that subclass is the fastest way to see exactly what is occupied versus assumed to be occupied.
Explore claim charts in EurekaWatch for the 2025-26 publication catch-up
Because recent years are still filling in, re-checking filing counts in six to twelve months will clarify whether the post-2020 contraction is a genuine slowdown or a data-lag artefact.
Set up a monitoring alert in EurekaTest the under-claimed branches
Channel congestion mitigation and satellite link continuity carry visibly thinner coverage than core traffic-control logic — worth a targeted prior-art search before drafting new claims.
Run a white-space search in EurekaCommon questions on this landscape
One assignee leads the ranked field with 10 records out of 25 ranked companies, a clear margin over the rest of the list. Beneath that leader the field thins quickly: the fifth-ranked and tenth-ranked assignees each hold only a single record. This pattern — one established filer plus a long tail of one-off filers — is typical of a specialised avionics niche rather than a broadly contested technology area.
Filing peaked at 5 records in 2020, the high point across the whole 2015-2026 window, and the documented change from 2021 to 2024 is -100%, a real contraction. However, publication typically lags filing by around 18 months, so the 2025-26 figures in this dataset are still incomplete and should not be read as proof the field has stopped moving. The safest reading is that the field saw a filing burst around 2020 followed by a quieter period that current data cannot yet fully characterise.
G08G, the traffic control systems subclass, appears in 85.0% of the 20 records in scope, making it the dominant classification by a wide margin. G01C (navigation) and G06F (digital data processing) each cover 15.0% of records, and several other classes including H04L and H04B sit around 10.0%. Because a single record can carry multiple IPC codes, these percentages overlap rather than sum to 100%, so they describe technical overlap rather than a clean split of the field.
US20210233412A1, assigned to Honeywell International, covers a system that predicts whether a tentative CPDLC request will be accepted by ATC and, if rejection looks likely, offers alternative requests with estimated delay times, using live traffic, navigation and sensor data. It blocks implementations that combine acceptance prediction with automatic alternative-request generation in this specific way. It does not necessarily block adjacent approaches such as post-rejection retry logic without predictive modelling, or integrity-checking mechanisms that operate independently of acceptance prediction — those would need their own freedom-to-operate check against the wider portfolio.
Relative to the 85.0% concentration in G08G traffic-control logic, classes tied to the messaging and transport layer — H04L digital information transmission and H04B transmission generally — cover only around 10.0% of the 20 records each, and G08B signalling and alarm systems covers just 5.0%. That suggests channel congestion mitigation, satellite link continuity handover and transport-layer message error detection are less thoroughly claimed than the core traffic-control decision logic. A first claim in these branches would likely focus on the communication-link reliability mechanism itself rather than on the ATC decision system that consumes 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.