Turbofan Engine Additive Manufacturing Patent Landscape
The turbofan engine additive manufacturing patent field is highly concentrated, with RTX Corp, General Electric, and Rolls-Royce collectively anchoring the top tier among 4,691 patent families in scope. Annual filing volume has eased substantially from its 2018 peak, though the corpus reflects a decade of deep, sustained investment by a small number of aerospace primes.
RTX Corp leads a tightly held field dominated by five aerospace primes
RTX Corp holds the top position in the applicant ranking with 4,313 patent records, followed by General Electric Co at 2,952 and United Technologies Corp at 2,920—three entities that together account for the bulk of the field’s documented innovation.
The top five filers—RTX Corp, General Electric Co, United Technologies Corp, Rolls-Royce PLC, and Pratt & Whitney Canada Corp—collectively represent 78% of the hundred largest filers’ combined total, signaling a field where a handful of vertically integrated OEMs have erected substantial prior-art barriers.
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 1 | RTX Corp | 4,313 | |
| 2 | General Electric Co | 2,952 | |
| 3 | United Technologies Corp | 2,920 | |
| 4 | Rolls-Royce PLC | 2,332 | |
| 5 | PRATT & WHITNEY CANADA CORP | 816 | |
| 6 | Rolls-Royce Corp | 513 | |
| 7 | Rolls-Royce North American Technologies Inc | 390 | |
| 8 | Honeywell International Inc | 319 | |
| 9 | Siemens Energy Inc | 283 | |
| 10 | Siemens AG | 227 |
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 11 | Safran Aircraft Engines SAS | 178 | |
| 12 | Solar Turbines Inc | 159 | |
| 13 | IHI Corporation | 140 | |
| 14 | Florida Turbine Technologies Inc | 116 | |
| 15 | SIEMENS ENERGY GLOBAL GMBH & CO KG | 110 | |
| 16 | SN DETUDE & DE CONSTR DE MOTEURS DAVIATION (S N E … | 90 | |
| 17 | ROLLS ROYCE DEUT LTD & CO KG | 85 | |
| 18 | MTU Aero Engines GmbH | 65 | |
| 19 | General Electric Technology GmbH | 59 | |
| 20 | GE Infrastructure Technology LLC | 49 |
This concentration means that new entrants or tier-2 suppliers face a dense thicket of overlapping claims across turbine structures, gas-turbine plant auxiliaries, and pumping systems before reaching open ground, and must differentiate on process chemistry, novel alloy systems, or highly specific component geometries.
Patent publication typically lags filing by 18–24 months, so figures for 2024–2026 undercount actual recent activity; trend reads for those years should be treated as provisional. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Filing volume peaked in 2018 and has moderated; turbine structures dominate the technology mix
The annual filing chart captures a decade-long arc that crested in 2018, while the IPC composition chart reveals that core turbine-structure classes dwarf the dedicated additive manufacturing classification, pointing to where OEMs have chosen to stake their claims.
Annual filing trend
Annual filings peaked in 2018 at 911 patent records before declining to 437 in 2021 and moderating further thereafter; 2024–2026 data are incomplete due to publication lag and should not be read as a continued structural decline. The field reached its lifecycle inflection point around 2018, and the multi-year moderation reflects both maturation of core process patents and consolidation among the leading filers.
↗ Hover for values · click a bar to ask EurekaTechnology composition
F01D (Turbines and non-positive engines) accounts for by far the largest share of IPC classifications, with F02C (Gas-turbine plants) and F04D (Non-positive-displacement pumps) as secondary clusters. Notably, B33Y (Additive manufacturing / 3D printing) appears much further down the list, indicating that applicants have historically anchored claims in component-function classes rather than the process-method class—a strategic choice that broadens the scope of protection.
↗ 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.
Bimetallic hydrogen fuel nozzle with multiple flow…
A hydrogen fuel nozzle for a gas turbine engine has a plurality of flow circuits, each of which is configured to flow one of a fuel or an oxidizer to a gas turbine engine combustor positioned downstream of the hydrogen fuel nozzle when the gas turbine engine is assembled. At least one of the plurality of flow circuits is a hydrogen flow circuit configured… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | Counter rotating aircraft gas turbine engine with … | 387 |
| 2 | Impingement cooled transition duct | 385 |
| 3 | Chevron film cooled wall | 380 |
| 4 | Aircraft engine with inter-turbine engine frame | 364 |
| 5 | Evaporatively cooled rotor for a gas turbine engine | 353 |
| 6 | Microturbomachinery | 326 |
| 7 | Vane assembly and temperature control arrangement | 326 |
| 8 | High pressure gas generator rotor tie rod system f… | 296 |
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 patent structure means for R&D investment decisions
Four structural factors—lifecycle stage, competitive concentration, co-filing ecosystems, and geographic coverage—shape where incremental R&D spend is most likely to find differentiated space.
Field is past peak; core turbine-AM patents are largely staked
The lifecycle evidence indicates that annual filings have eased back from their 2018 peak, placing this field in a declining phase by annual-volume measures. Core process and component patents filed by the major OEMs from 2015–2020 are now maturing toward grant and enforcement, raising the cost of undifferentiated entry. R&D investment should target process gaps—novel alloy systems, post-processing integration, or digital-twin inspection methods—where the prior-art density is lower.
Lifecycle: DeclineFive primes hold 78% of the top-100 filers’ combined records
The top five filers account for 78% of the hundred largest filers’ combined patent records, a level of concentration typical of regulated aerospace supply chains where qualification barriers amplify IP moats. The gap between Rolls-Royce PLC at rank four (2,332 patent records) and Pratt & Whitney Canada at rank five (816 patent records) marks a significant tier break. Challengers operating below that break—Rolls-Royce Corp (513), Rolls-Royce North American Technologies (390), Honeywell (319)—face a large absolute gap to the top tier.
High concentrationRolls-Royce’s intra-group co-filing is the dominant collaboration signal
The most active co-filing pair is Rolls-Royce Corp and Rolls-Royce North American Technologies Inc with 197 joint records, reflecting coordinated IP strategy across the group’s North American entities. Siemens AG and Siemens Energy Inc account for 30 joint records, while United Technologies Corp and MTU Aero Engines have 19 joint records—one of the few cross-group collaborations visible in the data. General Electric Co and Oliver Crispin Robotics also appear with 12 joint records, signaling GE’s interest in robotic AM inspection or repair. These patterns suggest that cross-company collaboration outside existing corporate families remains limited.
Intra-group dominantUS and EPO filings dominate; China and Asia are thin
The United States leads jurisdiction coverage with 6,459 patent records, followed by Europe via the EPO at 5,267. The United Kingdom (936), Canada (704), and Japan (678) form a secondary tier consistent with the home markets of the leading OEMs. China holds only 296 patent records, and South Korea 76, indicating that the major Western aerospace primes have not prioritized Asia-Pacific protection at scale—a potential exposure point if Chinese or Korean manufacturers accelerate in this domain.
US/EPO concentratedGo 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 |
|---|---|---|
| Rolls-Royce Corp | Rolls-Royce North American Technologies Inc | 197 |
| Siemens AG | Siemens Energy Inc | 30 |
| United Technologies Corporation | MTU Aero Engines GmbH | 19 |
| Rolls-Royce PLC | Rolls-Royce North American Technologies Inc | 19 |
| Rolls-Royce PLC | Rolls-Royce High Temperature Composites Inc | 19 |
| Rolls-Royce Corp | Rolls-Royce High Temperature Composites Inc | 19 |
| Rolls-Royce PLC | Rolls-Royce Corp | 15 |
| Rolls-Royce North American Technologies Inc | Rolls-Royce High Temperature Composites Inc | 14 |
| General Electric Company | Oliver Crispin Robotics Ltd | 12 |
| Siemens AG | Mikro Systems Inc | 12 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
RTX Corp leads on volume; Pratt & Whitney Canada is the only top-five filer showing positive recent momentum
The applicant ranking is anchored by two consolidated entities—RTX Corp and General Electric Co—whose portfolios span virtually every turbine sub-system. Recent filing trends reveal diverging trajectories within the top tier.
RTX Corp
RTX Corp ranks first with 4,313 patent records, the largest position in the field by a wide margin. Its technology emphasis is concentrated in F01D 5 (turbine blade and vane structures), F02C 7 (gas-turbine plant auxiliaries), and F01D 25 (turbine casings and bearing supports)—a portfolio shaped by the integration of Pratt & Whitney and Collins Aerospace legacy assets. Recent filing trend is down 11%, consistent with the field-wide moderation from the 2018 peak but less severe than peers, suggesting RTX continues to file selectively in core areas.
patent records: 4,313Pratt & Whitney Canada Corp
Pratt & Whitney Canada Corp holds 816 patent records at rank five, but stands out as the only top-five filer with a positive recent filing trend at +33%, making it the most active upward mover among the large incumbents. Its technology focus mirrors the broader RTX group—F01D 5, F04D 29, and F01D 25—but its regional specialization in business and regional jet engines may be driving continued investment in additive-manufactured components for smaller, higher-cycle powerplants where AM economics are most favorable.
patent records: 816| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| General Electric Company | 118 | ▼ -17% |
| Rolls-Royce PLC | 103 | ▼ -66% |
| RTX Corporation | 395 | ▼ -11% |
| Pratt & Whitney Canada Corp | 97 | ▲ +33% |
| Rolls-Royce Corp | 12 | ▼ -84% |
| Rolls-Royce North American Technologies Inc | 6 | ▼ -81% |
| Honeywell International Inc | 12 | ▼ -79% |
| Siemens Energy Inc | 2 | ▲ new entrant |
Under-served adjacent branches worth monitoring for white-space entry
Several IPC branches adjacent to the dominant turbine-structures cluster carry meaningful patent counts but remain small relative to the core, suggesting areas where the prior-art density may be lower and differentiated filing is more tractable.
C23C · Coating and surface deposition
C23C (Coating and surface deposition) holds 696 patent records—only 2% of the classified corpus—despite being directly relevant to thermal barrier coatings, environmental barrier coatings, and bond-coat systems applied in or after additive manufacturing of hot-section components. The sparse coverage relative to the scale of the underlying engineering problem suggests that process-integrated coating deposition (e.g., directed-energy deposition with in-situ coating) is an under-claimed area. Entry paths exist for materials specialists and coating OEMs not currently active in the top-20 applicant list.
Search this in Eureka →B22F · Powder metallurgy
B22F (Powder metallurgy) appears with 315 patent records, representing roughly 1% of the classified corpus despite powder-bed fusion and directed-energy deposition processes being foundational to metal AM for turbofan components. The low share relative to the structural turbine classes indicates that upstream powder characterization, powder recycling, and feedstock qualification—critical to AM part certification—are comparatively under-patented by the dominant OEMs. Powder suppliers, material qualification firms, and research institutions represent plausible entry vectors.
Search this in Eureka →How leading applicants differ by technology route emphasis
Route coverage across the main technology branches in the current evidence set.
| Player | F01D 5 · Turbines & non-positive engines | F02C 7 · Gas-turbine plants | F01D 25 · Turbines & non-positive engines | F01D 9 · Turbines & non-positive engines | F04D 29 · Non-positive-displacement pumps |
|---|---|---|---|---|---|
| United Technologies Corporation | Strong · 5,887 | Moderate · 1,619 | Moderate · 1,519 | Moderate · 1,387 | Emerging · 961 |
| General Electric Company | Strong · 2,976 | Moderate · 755 | Moderate · 668 | Emerging · 503 | Emerging · 423 |
| Rolls-Royce PLC | Strong · 2,260 | Emerging · 298 | Emerging · 354 | Emerging · 282 | Emerging · 340 |
| RTX Corporation | Strong · 1,069 | Emerging · 198 | Moderate · 253 | Moderate · 229 | Emerging · 111 |
| Pratt & Whitney Canada Corp | Strong · 775 | Emerging · 123 | Emerging · 136 | Emerging · 86 | Moderate · 159 |
| Rolls-Royce Corp | Strong · 487 | Emerging · 29 | Moderate · 111 | Emerging · 87 | Emerging · 50 |
| Rolls-Royce North American Technologies Inc | Strong · 366 | Absent | Moderate · 84 | Emerging · 50 | Emerging · 32 |
Frequently asked questions
The corpus covers 4,691 patent families in scope. Patent-record counts by applicant and IPC class are higher because a single family can be filed across multiple offices and carry multiple classification codes.
RTX Corp leads the applicant ranking with 4,313 patent records, ahead of General Electric Co at 2,952 and United Technologies Corp at 2,920.
Annual filing volume peaked in 2018 and has eased back since, placing the field in a declining phase by annual-volume measures. Data for 2024–2026 are incomplete due to publication lag and should not be read as a continued structural decline without further monitoring.
The United States leads with 6,459 patent records, followed by Europe via the EPO at 5,267. The United Kingdom, Canada, and Japan form a secondary tier. China holds only 296 patent records, indicating limited Asia-Pacific protection by the dominant Western OEMs.
F01D (Turbines and non-positive engines) is by far the most densely patented IPC class in this corpus, followed by F02C (Gas-turbine plants) and F04D (Non-positive-displacement pumps). The dedicated additive manufacturing class B33Y holds comparatively few records, indicating that applicants have anchored claims in component-function rather than process-method classes.
The most active co-filing relationship is between Rolls-Royce Corp and Rolls-Royce North American Technologies Inc with 197 joint records, reflecting intra-group IP coordination. Siemens AG and Siemens Energy Inc have 30 joint records. Cross-group collaboration is limited, with United Technologies Corp and MTU Aero Engines as a notable exception at 19 joint records.
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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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