Turbofan Engine Simulation Patent Landscape 2026
The turbofan engine simulation patent space is highly concentrated: RTX Corp alone accounts for the largest single block of patent records among the top-100 filers, and the top five applicants together hold 65% of that group’s combined output. The field peaked in 2017 and annual volume has since eased, with the United States and Europe remaining the dominant filing destinations.
RTX Corp leads a tightly consolidated field dominated by established aerospace OEMs
RTX Corp sits at the top of the applicant ranking with 302 patent records, more than double the next-ranked filer, Rolls-Royce PLC at 151. General Electric and United Technologies Corp follow closely at 122 and 121 patent records respectively, with Honeywell International rounding out the top five at 96.
The top five applicants together account for 65% of the hundred largest filers’ combined patent records, a level of concentration that signals a mature, oligopolistic competitive structure. The gap between the first tier (RTX, Rolls-Royce, GE, UTC, Honeywell) and the second tier (Pratt & Whitney Canada at 67, Rolls-Royce Corp at 32) is substantial, making breakout by a challenger without deep aerospace heritage unlikely in the short term.
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 1 | RTX Corp | 302 | |
| 2 | Rolls-Royce PLC | 151 | |
| 3 | General Electric Company | 122 | |
| 4 | United Technologies Corporation | 121 | |
| 5 | Honeywell International Inc. | 96 | |
| 6 | PRATT & WHITNEY CANADA CORP | 67 | |
| 7 | Rolls-Royce Corp. | 32 | |
| 8 | GTE Turbine Efficiency Sweden AB | 25 | |
| 9 | Hamilton Sundstrand Corporation | 23 | |
| 10 | IHI Corporation | 22 |
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 11 | Lean Flame Inc. | 20 | |
| 12 | Solar Turbines Inc. | 12 | |
| 13 | Siemens Energy Inc. | 11 | |
| 14 | Ansaldo Energia Switzerland AG | 10 | |
| 15 | TurboGen Ltd. | 10 | |
| 16 | NANJING UNIV OF AERONAUTICS & ASTRONAUTICS | 10 | |
| 17 | Mitsubishi Heavy Industries Aero Engines Ltd. | 10 | |
| 18 | GE Infrastructure Technology LLC | 8 | |
| 19 | Oliver Crispin Robotics Ltd. | 7 | |
| 20 | AECC Hunan Aviation Powerplant Research Institute | 7 |
The leaders’ positions imply that core simulation IP for turbofan architecture — covering rotor dynamics, gas-turbine plant modeling, and compressor behavior — is substantially locked up. New entrants and challengers are more likely to find traction in adjacent simulation sub-domains such as combustion chemistry, digital data processing, and propulsion integration rather than contesting the dominant classes directly.
Filing counts for 2025 and 2026 reflect publication lag and should be treated as incomplete; the apparent low volume in those years does not indicate a further decline beyond the trend established since 2017. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Annual volume has eased from a 2017 peak; turbine and gas-plant classes dominate the technology mix
The filing trend and technology composition charts together reveal a field that established its IP foundations before 2020 and has since shifted toward incremental refinement rather than expansive new filing. The technology mix is anchored in core mechanical classes with a thin but growing presence of digital and manufacturing branches.
Annual filing trend
Filings peaked at 67 in 2017 and then stepped down through 2022–2023, with a partial recovery visible in 2024 at 40. The most recent years (2025–2026) are affected by publication lag and should not be read as a continuation of the decline. The overall recent-window growth stands at -43%, confirming the field is past its peak on an annual basis even as the multi-year corpus remains substantial.
↗ Hover for values · click a bar to ask EurekaTechnology composition
F01D (Turbines & non-positive engines) and F02C (Gas-turbine plants) together account for the large majority of records, reflecting the core thermodynamic and mechanical simulation focus. F04D (Non-positive-displacement pumps / compressors), F02K (Jet & reaction propulsion), and F23R (Combustion chambers) form a meaningful secondary tier. Digital processing (G06F) and additive manufacturing (B33Y) appear as sparse but emerging branches, suggesting early-stage integration of model-based and manufacturing simulation methods.
↗ 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.
Predicting Turbofan Engine Properties
Embodiments determine physical properties of turbofan engines. An embodiment, in memory, obtains: (i) a computer-aided design (CAD) model representing a turbofan engine and (ii) an indication of flow conditions. In turn, a solver input file is automatically determined based on the CAD model and the indication of flow conditions. Responsively, a simulation… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | Low emissions combustor for a gas turbine engine | 204 |
| 2 | Low emissions combustor for a gas turbine engine | 196 |
| 3 | Turbofan engine | 186 |
| 4 | Additive manufactured ducted heat exchanger system… | 133 |
| 5 | Low emissions combustor for a gas turbine engine | 126 |
| 6 | Interchangeable combustor chute | 120 |
| 7 | Altering vibration frequencies of workpieces, such… | 117 |
| 8 | Gas turbine engine components with cooling hole tr… | 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 patent structure means for R&D investment decisions
The combination of high concentration, a post-peak filing curve, and narrow geographic focus shapes the risk-reward calculus for any team considering entry or expansion in turbofan engine simulation IP.
Field is in decline phase — core IP well established since 2017
The lifecycle assessment places this field in decline, with annual filings easing back from the 2017 peak of 67. The foundational simulation IP covering turbine stages, gas-plant models, and compressor maps is largely claimed by the top OEMs. R&D teams entering now face a high prior-art density in the dominant classes and should target sub-domains where coverage is demonstrably sparse.
Post-peak · 2017 peakTop five hold 65% of the hundred largest filers’ output — limited room for late entrants in core classes
RTX Corp’s 302 patent records dwarf all challengers, and the combined weight of the top five (RTX, Rolls-Royce PLC, GE, UTC, Honeywell) makes direct competition in core mechanical simulation classes cost-prohibitive for most new entrants. The second tier — Pratt & Whitney Canada, Rolls-Royce Corp, GTE Turbine Efficiency Sweden — holds meaningful but significantly smaller positions. Strategic entry is more viable in adjacent digital and combustion simulation branches where concentration is lower.
High concentration · oligopolyGE–Oliver Crispin Robotics leads co-filing; intra-group partnerships dominate
The most active co-filing pair is General Electric Co and Oliver Crispin Robotics with 7 joint filings, followed by GE with GE Poland (2) and GE with ExxonMobil Upstream Research (2). On the Rolls-Royce side, Rolls-Royce Corp co-filed with Rolls-Royce North American Technologies (2) and Allison Advanced Development (1). Collaboration patterns are predominantly intra-group or OEM-to-captive-supplier, suggesting limited open-innovation activity and few cross-industry bridges.
Intra-group co-filingUS and EPO capture the dominant share of filings; China and PCT are secondary
The United States leads all filing offices with 442 patent records, followed closely by Europe (EPO) at 362. WIPO PCT (71) and China (65) represent meaningful but considerably smaller secondary destinations. Canada (54) and Japan (51) reflect the home-jurisdiction strategies of Pratt & Whitney Canada and IHI Corp respectively. The sparse footprint in China and India relative to the US/EPO pair suggests potential freedom-to-operate in Asian markets for well-scoped simulation methods, though this should be verified with a full freedom-to-operate analysis.
US/EPO dominantGo 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 |
|---|---|---|
| General Electric Company | Oliver Crispin Robotics Ltd. | 7 |
| General Electric Company | GE Poland Sp. z o.o. | 2 |
| General Electric Company | ExxonMobil Upstream Research Company | 2 |
| Rolls-Royce Corp. | Rolls-Royce North American Technologies Inc. | 2 |
| Rolls-Royce Corp. | Allison Advanced Development Company Inc. | 1 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
RTX Corp dominates by volume; GE is the fastest-growing challenger
Two distinct tiers are visible: RTX Corp holds a commanding lead by patent records, while General Electric is the only major incumbent showing significant recent filing momentum. Rolls-Royce PLC remains a strong second-tier presence but is filing at a declining rate.
RTX Corp
RTX Corp leads the ranking with 302 patent records, a position built on deep coverage across F01D (turbines), F02C (gas-turbine plants), and F04D (compressors) — the three most populated IPC classes in the corpus. Recent filing momentum is flat at 0% versus the prior period, indicating a consolidation rather than expansion posture. The scale of their portfolio makes RTX the dominant prior-art reference for any new filing in core turbofan simulation.
patent records: 302General Electric Co
General Electric ranks third overall with 122 patent records and is the standout momentum story, with recent filings up 71% versus the prior period. GE’s technology emphasis skews toward F02C (gas-turbine plant simulation) as its primary class, with meaningful F01D and turbine structural coverage as well. Their co-filing relationship with Oliver Crispin Robotics (7 joint filings) signals an active interest in robotics-integrated inspection and simulation workflows, a potentially differentiating direction.
patent records: 122| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| Rolls-Royce PLC | 12 | ▼ -40% |
| General Electric Company | 24 | ▲ +71% |
| Honeywell International Inc. | 1 | ▲ new entrant |
| Pratt & Whitney Canada Corp. | 12 | ▲ +20% |
| RTX Corp | 11 | ▬ 0% |
| Hamilton Sundstrand Corporation | 1 | ▲ new entrant |
Under-served adjacent branches worth watching in turbofan simulation
Several IPC classes appear at the periphery of the dominant mechanical simulation core. These branches are observations of relative sparsity within the corpus; they are adjacent to the dominant classes and may carry technical value, but should not be treated as validated commercial opportunities without further analysis.
G06F · Electric digital data processing
With 56 patent records, G06F is the largest of the sparse adjacent branches and represents the intersection of turbofan simulation with software-defined modeling, numerical solvers, and digital-twin frameworks. It is notable that G06N (AI-based computing) holds only 7 records, confirming that machine-learning-augmented simulation is at a very early stage in this corpus. Teams working on physics-informed neural networks or real-time digital-twin engines for turbofan components would find relatively low prior-art density here. Entry would require coupling domain-specific thermodynamic knowledge with modern computational methods.
Search this in Eureka →F02K · Jet & reaction propulsion
F02K holds 149 patent records — substantial in absolute terms but only 7% of the total record count, making it sparse relative to the dominant F01D and F02C classes. Simulation of jet and reaction propulsion integration, including nozzle performance modeling and thrust vectoring, sits here. With increasing interest in hybrid-electric propulsion and variable-cycle engines, simulation methods bridging F02K with electrical systems (H01M, H04B) appear largely unclaimed. Entry paths exist for teams with propulsion-system integration expertise, particularly those able to model transient thrust dynamics in novel cycle architectures.
Search this in Eureka →How the leading filers 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 | F04D 29 · Non-positive-displacement pumps | F02C 3 · Gas-turbine plants | F01D 25 · Turbines & non-positive engines |
|---|---|---|---|---|---|
| United Technologies Corporation | Strong · 269 | Moderate · 127 | Moderate · 124 | Moderate · 87 | Emerging · 42 |
| Rolls-Royce PLC | Strong · 91 | Strong · 58 | Moderate · 29 | Emerging · 14 | Moderate · 23 |
| General Electric Company | Strong · 56 | Strong · 69 | Emerging · 11 | Moderate · 20 | Moderate · 24 |
| Honeywell International Inc. | Strong · 82 | Emerging · 10 | Emerging · 5 | Emerging · 6 | Absent |
| Pratt & Whitney Canada Corp. | Strong · 44 | Moderate · 20 | Emerging · 2 | Absent | Emerging · 7 |
| RTX Corp | Strong · 24 | Moderate · 10 | Emerging · 3 | Moderate · 5 | Moderate · 5 |
| GTE Turbine Efficiency Sweden AB | Absent | Strong · 21 | Absent | Moderate · 8 | Strong · 17 |
Frequently asked questions
The corpus contains 386 patent families in scope. The ranking of individual applicants is measured in patent records, which can exceed the family count because a single family may be filed across multiple offices.
RTX Corp leads the ranking with 302 patent records, more than double the second-ranked filer, Rolls-Royce PLC at 151. Together with General Electric (122), United Technologies Corp (121), and Honeywell International (96), these five applicants account for 65% of the hundred largest filers’ combined patent records.
No. The field peaked in 2017 at 67 annual filings and has since eased. The recent-window growth rate stands at -43%, placing the lifecycle stage in decline. The 2025 and 2026 data points are affected by publication lag and should not be interpreted as further acceleration of the decline.
The United States leads with 442 patent records filed there, followed by Europe (EPO) at 362. WIPO PCT (71) and China (65) are meaningful secondary destinations. Canada (54) and Japan (51) reflect specific applicant home-market strategies.
G06F (electric digital data processing) at 56 records and G06N (AI-based computing) at just 7 records are notably sparse given the industry-wide push toward digital twins and machine-learning-augmented simulation. F02K (jet and reaction propulsion) at 149 records is larger in absolute terms but represents only 7% of total records, leaving propulsion-integration simulation relatively open.
General Electric is the standout, with recent filings up 71% versus its prior period, supported by 122 total patent records. Pratt & Whitney Canada shows a more modest upward trend at +20%. Rolls-Royce PLC is moving in the opposite direction at -40% in the recent window. Honeywell International and Hamilton Sundstrand both appear as new entrants in the most recent filing window.
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