Turbochargers Patents: Who Leads, Where the Gaps Are 2026
- Five companies hold 39.2% of the field. 434 of 1,106 records in scope sit with the top five assignees, with a further long tail of single- and few-filing entrants.
- Filing has cooled since a 2017 peak of 51. The midpoint year (2022) sits at 18 filings, and the trend has not recovered — though the most recent year is always undercounted due to publication lag.
- Variable-geometry turbine claims dominate cited prior art. The most-cited records in the set are almost all built around variable-nozzle and variable-geometry turbine mechanisms, some dating to the late 1980s.
What the turbocharger and supercharger patent record shows
Turbocharger and supercharger patenting sits at the intersection of internal-combustion engine design and turbine engineering. This landscape covers 1,106 records filed or published between 2015 and 2026, filtered to claims touching turbo lag and transient response, variable geometry turbines, bearing and oil-coking systems, compressor surge behaviour, and waste-gate or e-boost control. Nearly all records carry an F02B internal-combustion-engine classification, but more than a third also carry an F01D turbine classification — a sign that the hardest claims in this space sit at the mechanical boundary between the engine and the turbine, not inside either discipline alone.
Filing concentrated among a small group of established turbocharger and heavy-duty engine manufacturers, with a long tail of single-filing entrants below them. The technology composition confirms the field is still anchored in mechanical turbine and engine-control claims rather than pure electrification, though e-boost and electric turbocharger language appears in the search scope.
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Filing trend and technology composition
Two views of the same 1,106-record dataset: how filing volume moved year over year, and which IPC subclasses carry the claim density.
Filing trend, 2017-2026
Filings peaked at 51 in 2017 and had fallen to 18 by the 2022 midpoint, with no recovery through the most recent complete years. Because publication typically lags filing by around 18 months, the final year or two in this trend will always read lower than eventual filings — but the multi-year decline predates that effect.
IPC subclass composition
F02B (internal-combustion engines) appears in 99.5% of the 1,106 records, essentially the floor set by the search scope. F01D (turbines) at 38.9% and F02D (engine control) at 34.2% are the two subclasses that separate turbocharger-specific claims from generic engine filings; F04D (pumps, 9.2%) and F01L (valve gear, 2.2%) are the thinnest bands, and thin bands are where claim space remains comparatively open.
Shares are the percentage of the 1,106 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Turbochargers and Superchargers with Eureka
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Try EurekaThe prior art still doing the most work
Variable geometry turbine and turbocharger with same
Provided are a variable geometry turbine and a turbocharger with the same. The variable geometry turbine is provided with a turbine impeller, a housing, a plurality of nozzle vanes, and a link mechanism. Inside the housing, a link compartment in which the link mechanism is accommodated is formed, the link compartment being separated from a nozzle flow path by a hub-side member having a hub side surface defining the nozzle flow path. The link mechanism and each of the plurality of nozzle vanes are coupled together via a nozzle shaft penetrating through the hub-side member. The hub-side member has at least one communication hole providing communication between the nozzle flow path and the link.Filed by Mitsubishi Heavy Industries Engine & Turbocharger — one of the most recent variable-geometry turbine filings in the set, illustrating that mechanical nozzle-vane sealing and link-compartment design are still active claim territory in 2025.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US5025629A | High pressure ratio turbocharger | 208 |
| 2 | US4804316A | Suspension for the pivoting vane actuation mechanism of a variable nozzle turbocharger | 205 |
| 3 | US4776168A | Variable geometry turbocharger turbine | 161 |
| 4 | US6263672B1 | Turbocharger and EGR system | 153 |
| 5 | US6360732B1 | Exhaust gas recirculation cooling system | 151 |
| 6 | US6401457B1 | System for estimating turbocharger compressor outlet temperature | 143 |
| 7 | US6079211A | Two-stage supercharging systems for internal combustion engines | 140 |
| 8 | US6360541B2 | Intelligent electric actuator for control of a turbocharger with an integrated exhaust gas recirculation valve | 118 |
| 9 | US6145313A | Turbocharger incorporating an integral pump for exhaust gas recirculation | 118 |
| 10 | US4679984A | Actuation system for variable nozzle turbine | 117 |
Citation counts favour older filings simply because they have had longer to accumulate citations inside this corpus — read them as a map of influence, not of current filing activity.
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Four read-throughs of the same dataset, each aimed at a different question a filing or freedom-to-operate review would ask.
The top of the field is dense, not crowded everywhere
The five leading assignees hold 434 of the 1,106 records in scope, and the top ten hold 711 — 64.3% of the field. That leaves a long tail of entrants with a handful of filings each, which is where freedom-to-operate searches most often turn up surprises.
Filing has slowed across the leading assignees, not just one
Recent-year momentum readings for several of the largest historical filers — spanning both turbocharger specialists and diversified engine manufacturers — show zero filings in the latest tracked year. A flat or falling trend across multiple leaders at once suggests a maturing claim base rather than one company pulling back.
The engine/turbine boundary carries the claim density
F01D turbine claims sit in 38.9% of records and F02D engine-control claims in 34.2%, both well above fuel supply (16.9%) or pump (9.2%) classes. That split points to where the contested claim territory actually is: control logic and turbine geometry, not the supply or exhaust hardware around them.
Variable-nozzle mechanics anchor the citation graph
The most-cited records in this set are built around variable-nozzle actuation and variable-geometry turbine turbines, some originally filed decades before the 2015-2026 window. New filings in this area are almost certain to be examined against this lineage.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to turbochargers and superchargers, with the prior art for and against each one.
Who is filing, and who has stopped
The ranking below covers the 100 companies the data endpoint returns for this search — it is the full ranking available, not a curated top tier.
One filer sits well clear of the pack
The leading assignee holds 121 records against 74 for the fifth-ranked filer and 30 for the tenth — a steep drop-off that flattens quickly once you move past the top five.
Co-assignment is rare and concentrated in one corporate family
Only ten co-assignee pairs appear in the dataset, and the strongest pairing links two entities inside the same corporate group. Cross-company co-filing is not a meaningful pattern here — most assignees file solely.
The largest historical filers show no recent-year activity
Several of the assignees with the deepest filing histories in this space — including one with a recorded -100% year-on-year change — show zero filings in the latest tracked year. Given publication lag, some of this understates true filing activity, but the pattern is consistent across more than one leader.
| Assignee | Recent year | YoY |
|---|---|---|
| Honeywell International Inc. | 0 | — |
| BorgWarner Inc. | 0 | — |
| Ford Global Technologies, LLC | 0 | — |
| Cummins Ltd. | 0 | -100% |
| Cummins Turbo Technologies Limited | 0 | — |
| GM Global Technology Operations LLC | 0 | — |
| Cummins Inc. | 0 | — |
| Caterpillar Inc. | 0 | — |
Where to take this analysis
The dataset points to specific follow-up questions rather than a single conclusion — each depends on what decision you're making.
Run a freedom-to-operate check on variable-geometry turbine claims
The most-cited prior art in this field clusters around variable-nozzle actuation mechanisms. Any new filing touching nozzle vane linkage or hub-side sealing should be checked against this lineage before drafting.
Explore variable-geometry prior art in EurekaTrack the leading assignees' recent-year filing gap
Multiple top filers show zero activity in the latest tracked year. Confirming whether that reflects publication lag or an actual pullback matters for competitive timing.
Monitor assignee filing activity in EurekaScope the thinner IPC bands before committing claim language
F04D and F01L carry the lowest record shares in this dataset. That is where claim space is least occupied — and where a well-drafted first claim has the most room.
Map white space by IPC class in EurekaCommon questions on turbocharger and supercharger patents
One assignee leads the ranked field with 121 records, well ahead of the fifth-placed filer at 74 and the tenth at 30. The top five assignees combined hold 434 of the 1,106 records in scope — 39.2% of the field — and the top ten hold 64.3%. Below that concentration sits a long tail of companies with only a handful of filings each, so a freedom-to-operate review needs to look well past the leaders.
The trend has been flat to declining across the tracked years: filings peaked at 51 in 2017 and had fallen to 18 by the 2022 midpoint, with several of the largest historical filers recording zero filings in the most recent tracked year. Publication lags filing by roughly 18 months, so the very last year in any dataset like this understates true activity. Even allowing for that lag, the multi-year decline from the 2017 peak is a real pattern, not a data artifact.
Nearly all records in this dataset carry an F02B internal-combustion-engine classification, which reflects the search scope rather than a finding. The more informative split is that F01D turbine claims appear in 38.9% of records and F02D engine-control claims in 34.2%, both well ahead of fuel-supply or pump classifications. That tells you claim density sits at the mechanical and control boundary between the engine and the turbine, not in peripheral hardware.
The thinnest IPC bands in this dataset are F04D (non-positive-displacement pumps, 9.2% of records) and F01L (valve gear, 2.2%), both well below the turbine and engine-control classes that dominate filing. Electric turbocharger and e-boost control language also appears in the search scope but has not produced the same claim density as mechanical variable-geometry designs. These lower-density areas are where a new entrant is less likely to run into dense prior art, though a proper freedom-to-operate search is still needed before relying on that.
The most-cited record in this dataset is a high-pressure-ratio turbocharger patent with 208 citations, followed closely by a variable-nozzle-vane actuation mechanism patent at 205. Most of the heavily-cited records are built around variable-geometry turbine and variable-nozzle actuation designs, several originally filed well before the 2015-2026 window covered here. High citation counts reflect long exposure inside the citation graph rather than current relevance, so treat them as a map of technical lineage rather than a signal of what's being filed today.
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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.