Cabin Pressurisation Control Patents: Leaders & Filing Trends 2026
- One filer dominates the field. The leading assignee alone accounts for 268 records, and the top 5 combined hold 33.0% of all 1,456 records in scope.
- Filing volume has cooled from its 2017 peak. The peak year so far was 2017 at 59 filings, and the 2021-to-2024 span shows a -9% shift (22 to 20), the most recent period reliable enough to read as a trend.
- Aircraft equipment claims dominate, but medical-device classes sit close behind. B64D covers 42.2% of records while A61M (body-fluid devices) reaches 10.6%, pointing to shared valve and pressure-sensing art across cabins and medical systems.
Filing growth compares 2021 (22 records) with 2024 (20) — 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 1,456 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
Cabin pressurisation control spans the sensors, outflow valves and controllers that hold an aircraft cabin at a survivable altitude equivalent while the aircraft itself climbs far higher. The search string pulls records built around cabin pressure control, outflow valve and cabin altitude language, cross-referenced against differential pressure, safety valve and valve actuator terms — a combination that catches both dedicated avionics filings and adjacent art from pressure-regulation fields that share the same valve and sensor mechanics.
The dataset runs from 2015 through the 2026-07-31 cut-off and holds 1,456 published records, each assigned to one or more of eight IPC subclasses that range from dedicated aircraft equipment to body-fluid devices and earth-drilling pressure control — a spread that signals how much of the underlying valve and sensing art is shared across industries rather than unique to aviation.
Filing trends and technology composition
Two views of the same 1,456 records: how filing activity has moved year over year, and which IPC subclasses carry the claim density.
Filing trend, 2017 peak to present
Filings peaked at 59 in 2017 and have since settled into a lower band; the 2021-to-2024 window shows a -9% move (22 to 20 records), the most recent period long enough after filing to read reliably. Everything from 2025 onward is still filling in as publication catches up with filing, typically by around 18 months, so the most recent bars in the chart understate true activity.
Technology composition by IPC subclass
B64D (aircraft equipment) carries 42.2% of the 1,456 records, consistent with a field anchored in avionics hardware. A61M (body-fluid devices) at 10.6% and G05D (control of non-electric variables) at 9.1% point to shared pressure-regulation and control-loop art with medical and industrial systems; F16K (valves & taps) at 6.3% and B01D (separation processes) at 6.0% round out the mechanical core. Because records can carry multiple classes, these shares sum past 100% and should be read as overlap, not as a partition of the field.
Shares are the percentage of the 1,456 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Cabin Pressurisation Control with Eureka
This page is one run against one query. Ask Eureka your own question about cabin pressurisation control and every answer comes back with the patent numbers behind it.
Try EurekaRepresentative filing and most-cited records
Cabin pressure control system and method
A cabin pressure control system and method includes one or more dual-channel controllers. One channel is primary and includes two dissimilar cabin pressure sensors and a controller that modulates the outflow valve position to control cabin pressure. The secondary channel includes a cabin pressure sensor and a differential pressure sensor configured to sense cabin-to-atmosphere differential pressure, and implements differential pressure limiting if the primary channel fails to do so.US20060019594A1 — Honeywell International, Inc.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US6626930B1 | Minimally invasive mitral valve repair method and apparatus | 1,400 |
| 2 | US6542076B1 | Control, monitoring and/or security apparatus and method | 581 |
| 3 | US7112207B2 | Minimally invasive mitral valve repair method and apparatus | 567 |
| 4 | US6542077B2 | Monitoring apparatus for a vehicle and/or a premises | 509 |
| 5 | WO2001028432A1 | Minimally invasive mitral valve repair method and apparatus | 435 |
| 6 | US7277010B2 | Monitoring apparatus and method | 392 |
| 7 | US6587046B2 | Monitoring apparatus and method | 372 |
| 8 | US20060064115A1 | Minimally invasive mitral valve repair method and apparatus | 369 |
| 9 | US20050192629A1 | Methods and apparatus for creating and regulating a gastric stoma | 333 |
| 10 | US7397363B2 | Control and/or monitoring apparatus and method | 318 |
Citation counts favour older filings in any searched corpus; treat them as a signal of influence within this dataset, not as a ranking of current importance.
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Three patterns stand out once the filing and citation data are read together.
A dominant leader, then a steep drop-off
The leading assignee holds 268 records on its own; by fifth place the count is down to 27, and by tenth place to 16. That gap between the leader and the rest of the ranked field means the core outflow-valve and dual-channel controller art is claimed densely by one player, while the remaining ranked assignees each hold a comparatively thin slice.
Post-peak plateau, not a collapse
Filings peaked at 59 in 2017 and have not returned to that level since. The 2021-to-2024 comparison (22 to 20 records) shows a modest decline rather than a field in retreat — recent years beyond 2024 are still incomplete in the record and should not be read as a continuing drop.
Aviation art sits beside medical-device art
Aircraft equipment (B64D) claims the largest share of records, but body-fluid device claims (A61M) and non-electric control claims (G05D) are large enough to suggest that valve actuation, pressure sensing and control-loop logic filed for cabins often reads across cleanly into medical and industrial pressure systems.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to cabin pressurisation control, with the prior art for and against each one.
Who is filing, and where the gaps are
The ranked field is led by one aerospace-systems filer with a wide margin over the rest, while co-filing activity stays limited to a handful of inventor pairings.
One filer sets the pace
The leading assignee's record count is roughly ten times the tenth-place total (16), a concentration typical of a field anchored around a small number of certified aircraft-system platforms rather than a broad open market.
A wide ranked field beyond the leaders
The top 10 combined hold 40.2% of all 1,456 records, meaning the majority of filings sit outside even the ten most active assignees. That long tail includes component suppliers, medical-device firms sharing valve art, and single-filing entrants testing adjacent applications.
Co-filing stays sparse and leader-centric
Only 10 co-assignee pairs appear in the dataset, and the strongest pairings all sit with the same lead assignee and named individual inventors, suggesting most cabin pressurisation IP is filed by single corporate entities rather than through joint ventures.
| Assignee | Recent year | YoY |
|---|---|---|
| Honeywell International Inc. | 0 | -100% |
| THE GARRETT CORP | 0 | — |
| Airbus Operations GmbH | 0 | — |
| SAFE MARINE TRANSFER LLC | 0 | — |
| Medtronic, Inc. | 0 | — |
| Dell Products L.P. | 0 | — |
| Edwards Lifesciences Corporation | 0 | — |
| Nord-Micro AG & Co. OHG | 0 | — |
Where to take this
The data points to a concentrated core and a thinner periphery — the next step is deciding which side of that line matters for your work.
Map the leader's claim boundaries
With one assignee holding 268 records, understanding exactly where its dual-channel controller and outflow valve claims stop is the first step before filing anything adjacent.
Explore assignee claim scope in EurekaTest the under-claimed branches
Negative pressure relief and landing-field elevation compensation show thinner filing density than the core valve art — worth a freedom-to-operate check before committing engineering time.
Run a white-space search in EurekaWatch the medical-device overlap
A61M's 10.6% share alongside B64D's 42.2% suggests valve and sensor art migrating between cabins and medical devices; tracking both classes together avoids blind spots.
Set up cross-class monitoring in EurekaCommon questions about this landscape
One aerospace-systems assignee leads the ranked field by a wide margin, with 268 of the 1,456 records in scope. The gap to the rest of the field is steep: fifth place holds 27 records and tenth place holds 16, so the leader's position is not a narrow edge but a substantial lead. This concentration reflects decades of certified outflow-valve and dual-channel controller designs built into commercial aircraft platforms.
Filing peaked at 59 records in 2017 and has not returned to that level since. Looking at the most recent reliable window, 2021 to 2024, filings moved from 22 to 20, a -9% change that reads as a plateau rather than a sharp decline. Years after 2024 in the dataset are still incomplete because publication typically lags filing by around 18 months, so those figures will rise as more records surface.
Beyond the core aircraft equipment class (B64D, 42.2% of records), a meaningful share of records fall under body-fluid device control (A61M, 10.6%) and non-electric variable control (G05D, 9.1%). Valve and taps (F16K) and separation processes (B01D) each cover a further 6% or so. This spread indicates that outflow valve actuation, differential pressure sensing and control-loop logic are shared building blocks across aviation, medical devices and industrial pressure systems, not exclusive to aircraft cabins.
This Honeywell filing describes a dual-channel cabin pressure control system: a primary channel with two dissimilar pressure sensors modulating an outflow valve, and a secondary channel with its own pressure sensor plus a differential pressure sensor that steps in to limit cabin-to-atmosphere differential pressure if the primary channel does not. It is a representative record of the dual-channel, fail-safe architecture that recurs across the leader's filing portfolio. Anyone designing a redundant pressure-control architecture should read its specific sensor-arbitration and failover logic closely rather than assuming a workaround exists by default.
The core outflow-valve and dual-channel controller art is densely claimed by the leading assignee, but adjacent branches show thinner filing density: negative pressure relief valve actuation, landing field elevation compensation logic, and multi-sensor differential pressure arbitration all appear as smaller, less consolidated pockets. The overlap zones with A62B (rescue and life-saving) and B01D (filtration) are also comparatively under-claimed relative to the B64D core. These are reasonable starting points for a freedom-to-operate search before committing to a specific claim architecture.
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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.
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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.