Electric Aircraft Propulsion Aerodynamics Patents: Leaders & Trends 2026
- Filings peaked in 2020 at 16 and dropped to a single filing by the 2022 midpoint — the core architecture claims were staked out early.
- B64D covers all 36 families while thinner classes like F04D (pumps), B64F and H04W sit at single-digit counts — the visible white space.
- One filing chain dominates citations with 392 and 249-cite records anchoring the series hybrid-electric powertrain architecture most others build around.
What this patent set covers
This landscape covers patent families at the intersection of electric and hybrid-electric aircraft propulsion and the aerodynamics of ducted fans, propellers, boundary-layer ingestion and distributed propulsion — filtered to IPC classes covering aeroplane control surfaces, electric propulsion units and aircraft structural elements. It is a narrow, technically specific slice: 36 patent families in total, concentrated in aircraft equipment and airframe classes rather than spread evenly across the aerospace patent literature.
Coverage runs from 2015 through the mid-2026 data cut-off, with the United States as the dominant receiving office by a wide margin over Canada, Europe, India and Australia. The filing trend and IPC composition below describe a field where the foundational architecture claims came early and concentrated, leaving a visible set of thinner, adjacent branches still open.
Filing trends and technology composition
Thirty-six patent families make up this corpus, spread across eight IPC subclasses and filed predominantly through the US patent office. The trend line and technology split below show where claim density sits today and where it has thinned out since the 2020 peak.
Filing activity peaked in 2020, then went flat
Filings rose from zero in 2017 to a peak of 16 in 2020, then fell back sharply — the 2022 midpoint sits at just one filing. Recent-year counts are understated because publication lags filing by roughly 18 months, but the drop from peak is steep enough that it likely reflects a real slowdown in new architectural filings, not just a reporting lag.
Claim density concentrates in airframe and motor classes
B64D (aircraft equipment) covers all 36 records, and B64C (aeroplanes and helicopters) appears in 22 — together these define the propulsion-architecture core of the corpus. H02K (electric motors and generators) at 18 shows steady hardware-side claiming, while G08G and G01C point to navigation and traffic-management concepts filed alongside the propulsion claims. F04D, B64F and H04W each sit in single digits, marking the thinnest branches of the tree.
Shares are the percentage of the 36 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Electric Aircraft Propulsion Aerodynamics with Eureka
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Try EurekaThe filing that defines the claimed envelope
Hybrid-electric aircraft, and methods, apparatus and systems for facilitating same
Hybrid-electric aircraft and a series hybrid powertrain configured to power the aircraft for a medium-haul flight. The series hybrid powertrain includes a plurality of energy storage units, at least one range-extending generator, and a plurality of electric propulsors, each coupled to a distribution bus. The electric propulsors can produce a maximum thrust of at least 15 MW. During a cruise regime, the hybrid-electric aircraft can have an airspeed of at least 0.7 Mach at an altitude of less than 32,000 feet, and the plurality of electric propulsors can have a fan pressure ratio of between 1.15 and 1.19. The hybrid-electric aircraft can have a degree of hybridization of at least 25%.Granted 2022-10-11 to Zunum Aero, Inc.; the numeric operating envelope in this claim recurs across the related, higher-cited filings in the same family.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20160236790A1 | System and methods for implementing regional air transit network using hybrid-electric aircraft | 392 |
| 2 | US20200290742A1 | Hybrid-electric aircraft, and methods, apparatus and systems for facilitating same | 249 |
| 3 | US20180134400A1 | System and methods for implementing regional air transit network using hybrid-electric aircraft | 87 |
| 4 | US9561860B2 | System and methods for implementing regional air transit network using hybrid-electric aircraft | 69 |
| 5 | US20210107664A1 | Electric aircraft propulsion system | 44 |
| 6 | WO2020227837A1 | Electric aircraft propulsion system | 37 |
| 7 | US10501194B2 | System and methods for implementing regional air transit network using hybrid-electric aircraft | 36 |
| 8 | US20200346769A1 | System and methods for implementing regional air transit network using hybrid-electric aircraft | 35 |
| 9 | US20220009644A1 | Electric aircraft propulsion system | 28 |
| 10 | EP3657468A1 | System and methods for implementing regional air transit network using hybrid-electric aircraft | 18 |
Ranked by citation count within the searched corpus; older filings accumulate more citations simply by being older, so treat this as a map of influence rather than current activity.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Browse MCP servers →What the filing pattern signals
Thirty-six families is a small corpus, so read every proportion here as a signal about where claim attention has gone, not as a market-size estimate. Three patterns stand out once the trend, IPC spread and citation concentration are put side by side.
The architectural land grab happened early
Filing volume rose from nothing in 2017 to 16 in 2020 and then collapsed to a single filing by 2022. That shape is consistent with a short window in which the core series hybrid-electric powertrain concepts were claimed, followed by a much quieter period where later filers work around an already-defined architecture rather than proposing new ones.
Claim density sits in airframe and motor, not in support systems
Every record in the corpus touches B64D (aircraft equipment), and most also touch B64C (aeroplanes) or H02K (electric motors and generators). Support and integration classes — F04D, B64F, H04W — barely register, which is where a new filer has room to define terms rather than argue around existing ones.
Influence concentrates in one filing family
The most-cited record draws 392 citations, more than four times the fifth-ranked record's 44. That concentration means the field's foundational thinking is unusually easy to trace to one architecture — series hybrid-electric propulsion for regional air transit — but it also means citation rank tells you about historical influence, not current filing activity.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to electric aircraft propulsion aerodynamics, with the prior art for and against each one.
Who is filing, and where the activity has gone quiet
The assignee picture in this corpus is thin at the top and thinner still in the latest year. Recent-year momentum data shows the two tracked assignees at zero filings in the latest year, one of them down 100% year-over-year — consistent with the broader trend of a 2020 peak that has not been repeated.
A small, technically specific corpus
At 36 families, this is a narrow landscape rather than a broad one. Concentration in a handful of architecture-defining filings means new entrants are more likely to be negotiating around existing claims than filing into open ground on the propulsion architecture itself.
Momentum has stalled at the top
Both assignees with recent-year momentum data show zero filings in the latest tracked year, with one down 100% year-over-year. That lines up with the corpus-wide trend line, where the 2020 peak of 16 filings has not been approached since.
Filing is US-centred with a thin international tail
The United States receives half of this corpus's filings, with Canada, the EPO, Australia and India each accounting for a handful. That pattern suggests the core IP strategy in this field is built around US protection first, with selective international filing rather than broad multi-jurisdiction coverage.
| Assignee | Recent year | YoY |
|---|---|---|
| Detroit Electric Automobile Company | 0 | — |
| ZUNUM AERO INC | 0 | -100% |
Where to take this analysis
The trend and composition data point to a narrow, early-concentrated field with specific gaps. These are the natural next steps for turning that into a filing or freedom-to-operate decision.
Run a freedom-to-operate check against the series-hybrid claim family
If your design touches series hybrid-electric powertrains, compare its thrust, Mach, altitude and hybridization parameters against the numeric envelope in the highest-cited filings before committing to an architecture.
Check claim scope in EurekaValidate the pump-integration and support-system gaps
F04D, B64F and H04W each show single-digit record counts against a 36-record corpus — test whether that reflects genuine white space or low commercial interest before drafting into it.
Explore white space in EurekaTrack assignee momentum before the next filing wave
With both tracked assignees at zero filings in the latest year, watch for the next uptick in filing activity to see who re-enters the space and with what architecture.
Monitor assignees in EurekaCommon questions on electric aircraft propulsion aerodynamics patents
Citation counts in this corpus are dominated by a small cluster of records built around regional air transit using hybrid-electric aircraft, with the two highest-cited filings drawing 392 and 249 citations respectively. Those citation counts favour older filings simply because they have had more time to be cited, so treat them as a signal of foundational influence rather than of who is most active today. Zunum Aero, Inc. is the named assignee on several of the highest-cited and most recently granted records in the set, making it the most consistently visible entity across both metrics.
The trend line shows filings climbing from zero in 2017 to 16 in 2020, then falling to a single filing at the 2022 midpoint. Part of that drop is a reporting artefact — publication typically lags filing by around 18 months, so the most recent years in any patent trend are always undercounted. But a decline that steep, sustained across multiple years rather than just the last one, points to a genuine slowdown in new architectural filings after the initial wave of series-hybrid and distributed-propulsion concepts was staked out.
US11465763B2, assigned to Zunum Aero, Inc. and granted in 2022, claims a series hybrid-electric powertrain for medium-haul flight with specific numeric limitations: at least 15 MW of maximum thrust, cruise at 0.7 Mach or faster below 32,000 feet, a fan pressure ratio between 1.15 and 1.19, and a hybridization degree of at least 25%. If your design uses a different topology — parallel-hybrid, fully electric, or a series-hybrid design that sits outside one or more of those numeric bands — it has a credible argument for falling outside the literal claim, but that requires a claim-by-claim comparison rather than a summary read of the abstract.
The IPC composition shows a sharp drop-off outside the core airframe and motor classes: F04D (non-positive-displacement pumps) has only 4 records, and B64F (ground installations) and H04W (wireless networks) each have just 1, against 36 records in B64D and 18 in H02K. That imbalance suggests the aerodynamic coupling between distributed electric propulsors and pump or cooling circuits — particularly boundary-layer-ingestion inlet ducting tied to variable pump control — is under-claimed relative to the dense architecture and motor filings around it. It is a drafting opportunity worth validating against your own roadmap, not a guarantee that a claim there will grant cleanly.
Based on the filing trend, growth is flat to declining rather than accelerating: the corpus peaked at 16 filings in 2020 and had fallen to a single filing by the 2022 midpoint. High filing density in the 2018-2020 window means the core architectural claim space — series hybrid powertrains, distributed propulsors, fan pressure ratio and hybridization parameters — is already occupied, not that the underlying technology has matured or been proven at commercial scale. New entrants are more likely to be filing into a defined space than opening new architectural ground.
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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.