Carbon Fiber Composites Patent Landscape 2026
Carbon Fiber Composites Patent Landscape in 2026
Carbon fiber composites IP is concentrated among a small tier of Japanese manufacturers and global aerospace OEMs, with Toray Industries holding the single largest position in a corpus of 10,080 patent families. The field reached its filing peak in 2018 and has eased since, making existing portfolio positions and adjacent under-served branches the primary strategic levers today.
Toray and Boeing anchor a highly concentrated leader tier
Toray Industries leads all applicants with 1,838 patent families, followed by The Boeing Company at 1,550 — together accounting for the largest share of the hundred top filers. The top five applicants collectively hold 41% of the combined output of the hundred largest filers, confirming a steep concentration gradient.
A clear two-tier structure exists: Toray and Boeing sit far above the next cluster — Mitsubishi Heavy Industries (588 families), Mitsubishi Chemical (552), and Subaru (408) — which in turn leads a broader mid-tier of aerospace, automotive, and materials specialists. The gap between tier one and tier two is substantial and suggests high barriers to displacing the leaders through volume alone.
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 1 | Toray Industries, Inc. | 1,838 | |
| 2 | The Boeing Company | 1,550 | |
| 3 | Mitsubishi Heavy Industries, Ltd. | 588 | |
| 4 | Mitsubishi Chemical Corporation | 552 | |
| 5 | Subaru Corporation | 408 | |
| 6 | Teijin Limited | 387 | |
| 7 | Toyota Motor Corporation | 375 | |
| 8 | Airbus Operations GmbH | 371 | |
| 9 | Mitsubishi Rayon Co., Ltd. | 258 | |
| 10 | Vestas Wind Systems A/S | 235 |
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 11 | Rolls-Royce plc | 206 | |
| 12 | Airbus Operations S.L. | 192 | |
| 13 | Mitsubishi Gas Chemical Company, Inc. | 181 | |
| 14 | Nippon Kayaku Co., Ltd. | 168 | |
| 15 | NIPPON STEEL CHEM & MATERIAL CO LTD | 156 | |
| 16 | Hitachi Astemo, Ltd. | 132 | |
| 17 | General Electric Company | 129 | |
| 18 | Nippon Steel Corporation | 126 | |
| 19 | Airbus Operations Ltd. | 109 | |
| 20 | DIC Corporation | 109 |
Toray’s focus on polymer processing and Boeing’s emphasis on plastics shaping and aircraft structures reflect complementary supply-chain roles: material science versus system integration. Both positions would be difficult to challenge without deep application-domain expertise and long customer-qualification cycles.
Filing counts for 2024–2026 are significantly under-counted due to patent publication lag, so the apparent sharp decline in those years overstates any real slowdown; the 2023 figure of 900 families is the most reliable recent data point.
Post-peak volumes and a shaping-dominated technology mix
The filing trend reveals a field that expanded sharply to a 2018 peak and has eased since, while the IPC composition shows that composite shaping and polymer processing collectively dwarf all end-use application branches.
Annual filing trend
Filings rose steeply from 1,212 families in 2017 to a peak of 1,597 in 2018, then declined to 1,027 in 2022 and 900 in 2023. Data for 2024–2026 are incomplete due to publication lag and should not be read as continued decline. The 2018 peak likely reflects intensifying aerospace and automotive lightweighting programmes converging simultaneously.
↗ Hover for values · click a bar to ask EurekaTechnology composition
B29C (shaping of plastics) and C08J (polymer processing and solutions) are the two dominant branches, reflecting the field’s core focus on manufacturing process IP rather than end-product design. Downstream application branches — B64C (aeroplanes), F03D (wind turbines), and F17C (pressure vessels) — are present but much smaller, indicating that most innovation is captured upstream in process and material IP.
↗ Hover for values · click a bar to ask EurekaFoundational and most-cited patents
The most-cited families that anchor this space. Hover a row and click to open it in Eureka.
Carbon fiber composite material boom, production m…
The present invention discloses a carbon fiber composite material boom, a production method thereof, and a truck-mounted concrete pump comprising the carbon fiber composite material boom. The production method of the carbon fiber composite material boom comprises: a flexible airbag is inflated to form an airbag in a first state and a carbon fiber prepreg is… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | Curable resin sols and fiber-reinforced composites… | 402 |
| 2 | Method for manufacturing windmill blades | 319 |
| 3 | Methods of manufacturing separable structures | 264 |
| 4 | Liquid composition, and method for manufacturing f… | 208 |
| 5 | Prepreg, preform and molded product | 201 |
| 6 | Method of molding shaped article of plastic compos… | 174 |
| 7 | Carbon fiber composite material and method for pro… | 173 |
| 8 | Implantable biomimetic prosthetic bone | 163 |
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.
What the competitive structure means for R&D investment
The combination of a post-peak trend, high concentration, active cross-sector collaboration, and Japan-led geography shapes a specific set of strategic considerations for new and existing participants.
Field is in a post-peak phase after a 2018 high
The lifecycle stage is assessed as Decline, with annual filings easing back from the 2018 peak of 1,597 families. The multi-year window still contains a large body of active IP, but the rate of new filing has reduced materially. For R&D teams, this means differentiation increasingly comes from depth in under-served sub-branches rather than broad volume strategies.
Post-peak · 2018 highTwo leaders, then a meaningful tier gap
The top five filers hold 41% of the hundred largest filers’ combined output, and the leader pair (Toray at 1,838 families, Boeing at 1,550) sit well above the next tier. Challengers in the 400–600 family range — Mitsubishi Heavy Industries, Mitsubishi Chemical, Subaru — occupy defensible but clearly secondary positions. New entrants face a high volume threshold to achieve comparable breadth.
Top-5 share: 41%Subaru–JX Nippon and Toray–Mitsubishi Heavy are the most active co-filer pairs
The most frequent co-filing relationship is Subaru Corporation with JX Nippon Oil & Energy (105 joint families), reflecting integrated automotive-materials development. Toray Industries and Mitsubishi Heavy Industries filed 38 joint families, linking the leading material supplier to a major aerospace integrator. Toyota Motor and Toyota Industries collaborated on 20 joint families, signalling intra-group automotive composites programmes. These pairings define the dominant collaboration topology: material-supplier + end-system integrator.
Subaru–JX Nippon: 105 co-filingsJapan anchors the field; China and the US are the key secondary markets
Japan leads all jurisdictions in patent records, followed by China, the United States, and Europe (EPO). Germany appears as a significant standalone national office, reflecting Airbus and automotive-sector activity. PCT (WIPO) filings indicate applicants pursuing broad international protection. South Korea, India, and Australia represent growing but secondary protection targets. Entrants should prioritise Japan and China prosecution to compete in both supply-chain and end-market jurisdictions.
Japan-led · China risingGo 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 |
|---|---|---|
| Subaru Corporation | JX Nippon Oil & Energy Corporation | 105 |
| Toray Industries, Inc. | Mitsubishi Heavy Industries, Ltd. | 38 |
| Toyota Motor Corporation | Toyota Industries Corporation | 20 |
| Toyota Motor Corporation | Aisin Takaoka Co., Ltd. | 13 |
| Toray Industries, Inc. | KU Leuven (Catholic University of Leuven) | 10 |
| Subaru Corporation | Fukui Prefecture | 10 |
| Airbus Operations GmbH | Airbus SAS (France) | 10 |
| Teijin Limited | Teijin Carbon Europe | 10 |
| Subaru Corporation | Tsudakoma Corp. | 9 |
| Toyota Motor Corporation | Toyota Motor Corporation | 9 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
Toray leads on material science; Boeing dominates process and airframe IP
The two clear leaders occupy complementary technology positions — one upstream in polymer processing, one downstream in aerospace shaping — and both show meaningful recent filing reductions consistent with the field’s post-peak trajectory.
Toray Industries
Toray holds 1,838 patent families, the largest position in the corpus. Its technology emphasis is concentrated in C08J (polymer processing and solutions), B29C (shaping of plastics), and B29K (plastics moulding materials) — reflecting a materials-science-first strategy spanning precursor chemistry through composite manufacture. Recent filings show a trend of ▼ –63% versus the prior three-year period, consistent with a maturing core portfolio rather than strategic retreat.
families: 1,838The Boeing Company
Boeing holds 1,550 patent families, focused heavily on B29C (shaping of plastics), B64C (aeroplanes and helicopters), and B29L (plastic products) — an application-integration posture that locks composite IP to specific airframe structures. Recent filings show a trend of ▼ –80% versus the prior period, the steepest reduction among top applicants, which may reflect portfolio rationalisation or a shift toward fewer, broader filings. Boeing’s collaboration with no external co-filer at significant scale suggests a largely proprietary development model.
families: 1,550| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| Toray Industries, Inc. | 104 | ▼ -63% |
| The Boeing Company | 120 | ▼ -80% |
| Mitsubishi Heavy Industries, Ltd. | 39 | ▼ -63% |
| Mitsubishi Chemical Corporation | 100 | ▬ 0% |
| Subaru Corporation | 46 | ▼ -49% |
| Toyota Motor Corporation | 38 | ▼ -48% |
| Airbus Operations GmbH | 18 | ▼ -42% |
| Teijin Limited | 47 | ▼ -53% |
Under-served branches adjacent to the dominant shaping core
The whitespace analysis identifies IPC branches that sit adjacent to the dominant shaping and polymer-processing core but carry relatively lower shares of the filing activity, suggesting areas where competitive density is lower and differentiated IP may be more achievable.
B32B · Layered products and laminates
B32B accounts for 6% of the branch-level records — meaningful in absolute terms but sparse relative to the shaping-dominated core. Laminate architecture IP bridges raw composite manufacture and structural end-product design, and is directly relevant to lightweighting in automotive body panels and wind blade skins. For a materials or process specialist already active in B29C, extending into B32B laminate-stack design could yield defensible adjacent claims without requiring new application-domain expertise.
Search this in Eureka →C08K · Use of additives in polymers
C08K holds a 5% share of branch records, covering additive formulations that modify composite matrix performance — including fire retardancy, conductivity, and toughness modifiers. As end-use sectors tighten performance requirements (e.g., pressure vessels for hydrogen storage, battery enclosures), additive-driven performance differentiation becomes technically valuable. The branch is adjacent to the heavily contested C08J and C08L polymer chemistry space, so entry would require clearly novel additive systems to avoid crowded prior art.
Search this in Eureka →How leaders differ across key technology routes
Strength of each leader across the main technology routes.
| Player | B29C 70 · Shaping of plastics | C08J 5 · Polymer processing & solutions | B29K 105 · Plastics moulding materials (index) | C08K 7 · Use of additives in polymers | B32B 5 · Layered products & laminates |
|---|---|---|---|---|---|
| Toray Industries, Inc. | Strong · 709 | Strong · 1,165 | Moderate · 333 | Emerging · 177 | Emerging · 229 |
| The Boeing Company | Strong · 1,431 | Emerging · 120 | Emerging · 124 | Absent | Emerging · 156 |
| Mitsubishi Heavy Industries, Ltd. | Strong · 503 | Absent | Moderate · 157 | Absent | Moderate · 101 |
| Subaru Corporation | Strong · 307 | Moderate · 120 | Moderate · 93 | Absent | Emerging · 56 |
| Toyota Motor Corporation | Strong · 334 | Absent | Moderate · 143 | Absent | Emerging · 37 |
| Mitsubishi Rayon Co., Ltd. | Absent | Strong · 253 | Moderate · 72 | Emerging · 24 | Moderate · 63 |
| Mitsubishi Chemical Corporation | Absent | Strong · 264 | Moderate · 83 | Emerging · 40 | Absent |
Frequently asked questions
The corpus analysed contains 10,080 patent families, spanning manufacturing processes, material compositions, and end-use applications across all major jurisdictions.
Toray Industries holds the largest position with 1,838 patent families, ahead of The Boeing Company at 1,550. Together they represent the dominant tier, with the next cluster of applicants holding 400–600 families each.
No. The field peaked at 1,597 families filed in 2018 and annual volumes have eased since. The lifecycle stage is assessed as Decline based on easing annual filings from that peak. Note that 2024–2026 data are incomplete due to publication lag and should not be treated as confirming continued decline.
Japan leads in patent records, followed by China, the United States, and Europe (EPO). Germany is a notable standalone national office. PCT (WIPO) filings are also significant, indicating applicants seeking broad international coverage.
B29C (shaping of plastics) and C08J (polymer processing and solutions) are the two largest IPC branches by record count, reflecting a field where manufacturing process IP dominates over end-product or application IP. End-use branches such as B64C (aeroplanes) and F03D (wind turbines) are present but much smaller.
Subaru Corporation and JX Nippon Oil & Energy are the most active co-filing pair with 105 joint families. Toray Industries and Mitsubishi Heavy Industries co-filed 38 families, and Toyota Motor collaborated with Toyota Industries on 20 joint families. These pairings generally connect materials suppliers with system integrators.
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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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