Geared Turbofan Fan Drive Gear Patent Landscape 2026
The geared turbofan fan drive gear patent space is dominated by RTX Corp and its legacy United Technologies entity, which together account for the overwhelming majority of filings among the hundred largest filers. Annual filing volume has eased markedly from its 2017 peak, signaling a field that has moved past its primary accumulation phase while core gas-turbine and transmission branches remain the focal points of activity.
RTX Corp leads a heavily concentrated field with a wide gap to all challengers
RTX Corp holds the top position with 483 patent records, more than double the 213 patent records attributed to United Technologies Corp — the same corporate lineage under an earlier entity name. MTU Aero Engines GmbH ranks third with 46 patent records, followed closely by Rolls-Royce plc at 39 and Rolls-Royce Deutschland Ltd & Co KG at 37.
The top five filers collectively account for 95% of the combined total among the hundred largest filers, indicating an exceptionally concentrated competitive structure. The gap between the top two entities and the next tier is substantial, and the gap between the third-ranked firm and those below it is similarly pronounced.
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 1 | RTX Corporation | 483 | |
| 2 | United Technologies Corporation | 213 | |
| 3 | MTU Aero Engines GmbH | 46 | |
| 4 | Rolls-Royce plc | 39 | |
| 5 | ROLLS ROYCE DEUT LTD & CO KG | 37 | |
| 6 | Rolls-Royce Corporation | 7 | |
| 7 | General Electric Company | 4 | |
| 8 | PRATT & WHITNEY CANADA CORP | 4 | |
| 9 | TOPOL DAVID A | 3 | |
| 10 | Florida Turbine Technologies Inc | 3 |
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 11 | CLOFT THOMAS G | 3 | |
| 12 | POTTER GLEN E | 3 | |
| 13 | Rolls-Royce North American Technologies Inc | 3 | |
| 14 | GUKEISEN ROBERT L | 3 | |
| 15 | THOMAS FLAVIEN L | 3 | |
| 16 | PRATT & WHITNEY | 2 | |
| 17 | GKN Aerospace Sweden AB | 2 | |
| 18 | Hamilton Sundstrand Corporation | 1 | |
| 19 | Raytheon Technologies Corporation | 1 | |
| 20 | MCCUNE MICHAEL E | 1 |
Such concentration signals that the core fan drive gear architecture has been locked up by a single corporate family over multiple patent cycles. Challengers seeking freedom-to-operate or differentiated positions face a dense claim landscape in the primary gas-turbine and jet-propulsion branches.
Filing counts for 2024 through 2026 are subject to publication lag and should be treated as undercounts; the apparent low volume in those years does not necessarily reflect a further structural retreat. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Filings peaked in 2017 and have eased; gas-turbine classes dominate but transmission and pump branches remain underweight
Two views of the corpus — annual filing volume and IPC class composition — together reveal both the maturity of core design patents and the relative sparsity of ancillary engineering branches.
Annual filing trend
Annual filings reached their highest recorded level of 54 patent records in 2017, then declined to 44 in 2018 before a partial recovery to 53 in 2019. From 2020 onward volume fell sharply — 28 records in 2020, 13 in 2021, 11 in 2022 — and has remained in single digits from 2023 through 2026. The years 2024–2026 are subject to publication lag and should be read as floors, not final counts.
↗ Hover for values · click a bar to ask EurekaTechnology composition
F02C (Gas-turbine plants) leads with 644 patent records, followed by F02K (Jet and reaction propulsion) at 477 and F01D (Turbines and non-positive engines) at 465. F16H (Gearing and transmissions), the branch most directly linked to the gear system itself, accounts for only 93 patent records, and F04D (Non-positive-displacement pumps) adds 73. Aircraft-integration branches B64D and B64C together contribute 65 patent records, confirming that system-level integration has received considerably less coverage than core thermodynamic and mechanical design.
↗ Hover for values · click a bar to ask EurekaHighly cited patent families surfaced by the query
Citation-heavy patent families returned by the query. Use this section as citation context, not as a curated list of the most topic-specific patents.
Gas turbine engine with geared turbofan and oil th…
A gas turbine engine includes a fan, a compressor section, a combustion section, and a turbine section. A fan drive gear system is configured for driving the fan at a speed different than the turbine section. A lubricant system includes a lubricant pump delivering lubricant to an outlet line. The outlet line splits into at least a hot line and into a cool… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | Geartrain coupling for a turbofan engine | 484 |
| 2 | Deicing of a geared gas turbine engine | 246 |
| 3 | High bypass turbofan engine having a partially gea… | 223 |
| 4 | Turbofan engine having a counterrotating partially… | 155 |
| 5 | Low noise turbine for geared turbofan engine | 126 |
| 6 | Geared turbofan engine with integral gear and bear… | 118 |
| 7 | Geared turbofan | 114 |
| 8 | Turbofan engine comprising an spicyclic transmissi… | 106 |
Ranked by total forward citations. Citation counts favour older and broadly cited patent families, and broad or adjacent patents may appear when they match the search scope. Treat this section as citation context, not as a curated list of the most topic-specific patents. Some patent titles may be shown in their original, non-English language where an accurate translation could not be guaranteed.
What the competitive structure means for R&D investment decisions
The field’s maturity, extreme concentration, and cross-entity collaboration patterns collectively define a challenging entry environment; understanding each dimension helps engineers prioritize differentiated work.
Decline stage: peak accumulation is behind the field
Annual filing volume has eased markedly from the 2017 peak, and the lifecycle evidence classifies the field as Decline. The core architectural claims around gas-turbine plants, jet propulsion, and turbine components were accumulated primarily between 2017 and 2019. New entrants should focus on adjacent or next-generation configurations rather than replicating filed ground.
Lifecycle: DeclineOne corporate family holds most of the terrain
The top five filers hold 95% of the combined total among the hundred largest filers, with the RTX/United Technologies lineage alone representing the dominant position. The drop from the top tier to MTU Aero Engines at rank three is steep. Any new entrant or challenger must either carve out non-overlapping claims in underserved branches or accept a high freedom-to-operate burden.
Top-5 share: 95%United Technologies–MTU axis is the most active co-filing partnership
The strongest co-filing relationship in the corpus is between United Technologies Corp and MTU Aero Engines GmbH with 36 co-filed records, reflecting their established joint-venture program on geared turbofan platforms. Rolls-Royce plc and Rolls-Royce Corp form a secondary intra-group axis with 5 co-filed records. Raytheon Technologies Corp and MTU Aero Engines GmbH show 4 co-filed records, carrying forward the partnership under the renamed entity.
Co-filing: UTA–MTU (36)US and EPO filings are nearly equal; coverage thins rapidly outside those two offices
The United States leads with 328 patent records and the European Patent Office follows closely with 325, together accounting for the bulk of jurisdictional coverage. WIPO PCT filings stand at 59 and Canada at 44, providing a secondary ring of protection. Presence in Singapore, Germany, the UK, Brazil, France, India, and Russia is sparse, suggesting that protection strategies have not prioritized emerging manufacturing markets.
Lead office: United StatesGo beyond the landscape: Eureka’s TRIZ Solution agent breaks down an R&D problem and returns patented concept solutions, each with a technical approach and cited patent & literature evidence.
| Applicant | Collaborator | Co-filings |
|---|---|---|
| United Technologies Corporation | MTU Aero Engines AG | 36 |
| Rolls-Royce plc | Rolls-Royce Corporation | 5 |
| Raytheon Technologies Corporation | MTU Aero Engines AG | 4 |
| United Technologies Corporation | MTU Aero Engines AG | 1 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
RTX Corp and its United Technologies legacy entity dominate; MTU Aero Engines is the notable new-entrant challenger
The ranking is shaped by a single corporate lineage that has filed consistently across all core gas-turbine, jet-propulsion, and turbine-component branches. MTU Aero Engines GmbH, though smaller in absolute count, has recently re-entered the corpus as a new entrant in the momentum data.
RTX Corp
RTX Corp leads with 483 patent records, concentrated in F02C Gas-turbine plants, F02K Jet and reaction propulsion, and F02C Gas-turbine plants sub-classes — the same thermodynamic core that defines the geared turbofan architecture. Its predecessor entity United Technologies Corp adds a further 213 patent records, meaning the combined corporate lineage is the decisive force in this space. Momentum data show Raytheon Technologies Corp (a related renamed entity) at a recent trend of down 31%, consistent with the field-wide deceleration from the 2017 peak.
patent records: 483MTU Aero Engines GmbH
MTU Aero Engines GmbH holds 46 patent records and is classified as a new entrant in the recent momentum window, indicating activity in the most recent filing period from a low prior base. Its technology focus spans F02C Gas-turbine plants, F02K Jet and reaction propulsion, and F01D Turbines — the same core classes as the leader, but with a more balanced split and additional weight on turbine-component sub-classes. The long-standing co-filing relationship with the United Technologies / RTX lineage (36 co-filed records) means some of MTU’s positions are built on joint architecture.
patent records: 46| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| Raytheon Technologies Corporation | 20 | ▼ -31% |
| MTU Aero Engines AG | 4 | ▲ new entrant |
Gearing, pump integration, and aircraft-system branches are sparse relative to core thermodynamic classes
Against a corpus where gas-turbine and propulsion classes dominate, several directly relevant engineering branches hold notably lower patent-record counts, making them worth examining for under-served technical problems.
F16H · Gearing & Transmissions
Despite being the IPC class most directly aligned with the fan drive gear mechanism itself, F16H accounts for only 93 patent records — roughly 5% of the IPC distribution. Given that gear geometry, load-sharing in epicyclic stages, and lubrication-induced thermal management are open engineering problems in high-bypass platforms, this branch is sparsely covered relative to its technical centrality. Entrants with expertise in precision gearing or tribology could file in F16H without immediately running into the dense RTX/United Technologies claim walls that characterize F02C and F02K.
Search this in Eureka →B64D · Aircraft Equipment Integration
B64D holds 46 patent records and B64C a further 19, together representing roughly 3% of the IPC distribution. Aircraft-level integration topics — nacelle acoustics, installation loads, power-extraction interfaces, and health-monitoring architectures — sit in these classes and are underrepresented relative to the size of the core propulsion corpus. As geared turbofan platforms mature and operators focus on maintenance economics and noise certification, system-integration filings in B64D could offer differentiated positions with lower overlap against existing RTX claims.
Search this in Eureka →How leaders differ by technology route across core and adjacent IPC branches
Route coverage across the main technology branches in the current evidence set.
| Player | F02C 7 · Gas-turbine plants | F02K 3 · Jet & reaction propulsion | F02C 3 · Gas-turbine plants | F01D 25 · Turbines & non-positive engines | F01D 5 · Turbines & non-positive engines |
|---|---|---|---|---|---|
| United Technologies Corporation | Strong · 418 | Strong · 344 | Strong · 303 | Moderate · 184 | Moderate · 121 |
| Raytheon Technologies Corporation | Strong · 77 | Strong · 75 | Strong · 60 | Moderate · 20 | Moderate · 21 |
| MTU Aero Engines AG | Strong · 21 | Strong · 21 | Strong · 20 | Moderate · 6 | Strong · 20 |
| Rolls-Royce plc | Strong · 28 | Moderate · 10 | Emerging · 2 | Moderate · 14 | Moderate · 9 |
| Rolls-Royce Deutschland Ltd & Co KG | Strong · 25 | Strong · 25 | Moderate · 9 | Emerging · 4 | Absent |
| Rolls-Royce Corporation | Strong · 5 | Absent | Absent | Strong · 7 | Absent |
| CLOFT THOMAS G | Strong · 3 | Absent | Strong · 2 | Strong · 3 | Absent |
Frequently asked questions
The corpus covers 219 patent families. Separately, the applicant ranking and IPC composition data are reported at the patent-record level, which can exceed the family count because a single family can be registered across multiple jurisdictions and classes.
RTX Corp leads with 483 patent records. United Technologies Corp, which is the predecessor entity in the same corporate lineage, holds a further 213 patent records. Together they represent by far the largest position among the hundred largest filers.
The field is classified as Decline. Annual filing volume peaked at 54 patent records in 2017, recovered partially to 53 in 2019, then fell sharply through the early 2020s. The recent-window growth figure is negative at -79%, confirming that accumulation has eased substantially from the peak phase.
The most active co-filing pair is United Technologies Corp and MTU Aero Engines GmbH with 36 co-filed records, reflecting their joint program on geared turbofan platforms. Rolls-Royce plc and Rolls-Royce Corp show 5 co-filed records, and Raytheon Technologies Corp and MTU Aero Engines GmbH show 4 co-filed records.
The United States leads with 328 patent records and the European Patent Office follows closely with 325. WIPO PCT filings stand at 59 and Canada at 44. Coverage drops significantly beyond these four, with Singapore at 21 and all remaining jurisdictions in single or low double digits.
F16H (Gearing and transmissions) holds only 93 patent records despite being the class most directly relevant to the fan drive gear mechanism. B64D (Aircraft equipment) has 46 and B64C (Aeroplanes and helicopters) has 19 patent records, indicating that aircraft-level integration work is sparse relative to the dominant gas-turbine and propulsion classes.
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