Floating Wind Turbine for Renewable Integration Patent Landscape
Floating Wind Turbine for Renewable Integration Patent Landscape in 2026
The University of Maine holds a commanding position in floating wind turbine IP, accounting for a dominant share of the top-ranked filers, with the field concentrated among a small cluster of specialized applicants. Annual filing volume peaked in 2021 and has eased since, signaling a field entering a post-growth consolidation phase rather than continued rapid expansion.
University of Maine leads a concentrated but specialized field
The University of Maine sits at the top of the
The top five filers together account for 41% of the combined output of the hundred largest filers, pointing to a moderately concentrated field where a handful of research-oriented and specialist commercial entities hold significant positions ahead of the broader long tail.
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 1 | University of Maine | 162 | |
| 2 | IFP Energies Nouvelles | 41 | |
| 3 | Principle Power Inc | 37 | |
| 4 | Encomara Ltd | 30 | |
| 5 | RCAM Technologies Inc | 22 | |
| 6 | Innovator Energy LLC | 17 | |
| 7 | Lone Gull Holdings Ltd | 16 | |
| 8 | Marine Power Systems | 15 | |
| 9 | Hardcastle Trevor M | 15 | |
| 10 | Mitsubishi Heavy Industries Ltd | 14 |
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 11 | University of Malta | 13 | |
| 12 | RWE Renewables GmbH | 13 | |
| 13 | Exponential Renewables SL | 12 | |
| 14 | Hitachi Ltd | 12 | |
| 15 | 4Subsea AS | 11 | |
| 16 | Barber Gerald L | 11 | |
| 17 | Ocean Wind Tech | 11 | |
| 18 | Offshore Power Plant | 10 | |
| 19 | MHWirth GmbH | 10 | |
| 20 | Dalian University of Technology | 10 |
The leader’s position is anchored in academic-origin IP, while challengers such as Principle Power and IFP Energies Nouvelles bring commercial platform and energy-sector institutional perspectives — suggesting that licensing, joint development, and standards-setting are plausible competitive levers rather than pure volume competition.
Filings from 2024 onward are subject to publication lag and are likely under-counted; the apparent softness in those years should not be read as a structural decline without further monitoring. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Peak activity in 2021 followed by consolidation; structural dual-class technology mix
The filing trend and technology composition charts together reveal a field that matured quickly over 2017–2021 and is now consolidating, dominated by a dual-class wind-motor and marine-vessel technology core with several secondary branches at much lower densities.
Annual filing trend
Filings climbed from 55 in 2017 to a peak of 110 in 2021, then eased to the 70–90 range through 2023–2024. The 2025 and 2026 figures are substantially under-counted due to publication lag and should not be interpreted as a continuing fall.
↗ Hover for values · click a bar to ask EurekaTechnology composition
Wind motors (F03D) and ships and marine vessels (B63B) are the two dominant IPC classes, each with substantially more records than any other branch, reflecting the inherently cross-disciplinary nature of floating wind platforms. Hydraulic machines (F03B), hydraulic and waterway engineering (E02B), and power supply and grid systems (H02J) are present at materially lower densities, indicating under-developed secondary coverage.
↗ 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.
Floating offshore wind turbine integrated with ste…
A floating offshore wind turbine integrated with a steel fish farming cage mainly includes a wind turbine, a wind turbine tower, a living quarter, a floating wind turbine foundation in a conic steel structure, a mooring system, a lateral net encircling the floating wind turbine foundation, a bottom net, and lifting systems. The upper end of the wind turbine… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | Floating offshore wind farm, a floating offshore w… | 115 |
| 2 | Power generation assemblies and apparatus | 97 |
| 3 | Power generation assemblies, and apparatus for use… | 94 |
| 4 | Deep offshore floating wind turbine and method of … | 89 |
| 5 | Floating Wind Turbine Platform and Method of Assem… | 83 |
| 6 | Offshore energy harvesting, storage, and power gen… | 74 |
| 7 | Power generation assemblies, and apparatus for use… | 70 |
| 8 | Floating wind turbine support system | 63 |
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 IP structure means for R&D investment decisions
The combination of a dominant academic leader, moderate top-five concentration, strong US and European jurisdictional positioning, and a post-peak filing cycle shapes a specific set of strategic implications for engineers and IP planners entering or expanding in this space.
Post-peak consolidation: the field has passed its 2021 high
The lifecycle evidence places this field in decline from its 2021 peak, with annual volume easing back rather than continuing to grow. New entrants still appear — RCAM Technologies and Innovator Energy LLC both show new-entrant momentum — but the dominant positions are largely set. R&D investment should focus on differentiated sub-niches rather than attempting to compete head-on with established volume leaders.
Post-peak · 2021 highModerate concentration with a very wide leader-challenger gap
The top five filers represent 41% of the hundred largest filers’ combined output, which is moderately concentrated. However, the gap between the leader (162 patent families) and the second-ranked applicant (41 patent families) is unusually wide, suggesting the University of Maine has built a near-insurmountable position in foundational platform concepts. Challengers are better positioned to differentiate on specific subsystems — mooring, grid integration, or hydraulic power take-off — than to challenge on breadth.
41% top-5 shareLimited formal co-filing; University of Maine and Alliance for Sustainable Energy most active
The most active co-filing pair is the University of Maine and the Alliance for Sustainable Energy, with 3 jointly filed patent families. Encomara Ltd and SLLP 134 Ltd show 2 co-filings. The overall collaboration network is thin, which may reflect the competitive sensitivity of platform design IP or the early-stage, single-inventor character of many applicants. Ecosystem-building through licensing or consortium arrangements may be more effective than formal co-filing.
Sparse co-filingUS-centric with strong European and PCT coverage; Asia notably thin
The United States leads jurisdictional filings, followed by Europe (EPO) and WIPO (PCT), with Germany, the United Kingdom, and Canada also present in meaningful numbers. China, Japan, and other Asian jurisdictions each have very few records despite the offshore wind build-out underway in those regions. This gap either reflects deliberate US/Europe-first prosecution strategies or a genuine Asian white space that late-movers could exploit.
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 |
|---|---|---|
| University of Maine | Alliance for Sustainable Energy LLC | 3 |
| Encomara Ltd | SLLP 134 Ltd | 2 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
University of Maine anchors the field; commercial challengers differentiate by subsystem
Two tiers are visible: a dominant academic-origin leader with broad wind-motor and marine-vessel coverage, and a set of commercial challengers each staking out narrower technical positions in mooring, platform stability, or hydraulic systems.
University of Maine
The University of Maine holds 162 patent families, the largest portfolio in the field by a wide margin. Its technology emphasis spans floating offshore wind turbine structural integration (B63B 35 and F03D 13, each with 95 records) and secondary wind-motor applications (F03D 9, 35 records), covering the full platform-level design space. Recent filing momentum shows a 34% decline versus the prior period, consistent with a maturing foundational portfolio rather than active volume growth.
patent families: 162IFP Energies Nouvelles
IFP Energies Nouvelles ranks second with 41 patent families, focusing on marine-vessel floating platforms (B63B 35, 26 records), wind-turbine offshore installation (F03D 13, 22 records), and — distinctively — vibration and damping systems (F16F 7, 16 records), which suggests a structural-dynamics differentiation strategy. Its applicant momentum is flagged as a new entrant in the most recent filing window, indicating a deliberate and recent acceleration into this space.
patent families: 41| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| University of Maine | 19 | ▼ -34% |
| IFP Energies Nouvelles | 2 | ▲ new entrant |
| Principle Power Inc | 3 | ▼ -75% |
| RCAM Technologies Inc | 11 | ▲ new entrant |
| Encomara Ltd | 4 | ▼ -71% |
| Innovator Energy LLC | 15 | ▲ new entrant |
Under-served adjacent branches worth monitoring
Several IPC classes appear at low density relative to the dominant wind-motor and marine-vessel core, representing areas where the existing corpus provides thin coverage and where targeted filings could establish differentiated positions.
H02J · Power supply and grid systems
With only 21 records against a corpus of 626 patent families, grid-integration IP is sparsely represented despite being a central challenge for floating offshore wind contributing to renewable energy grids. The technical value is high — grid connection architecture, dynamic cable management, and offshore AC/DC conversion are unsolved engineering problems at scale. An entry path exists through co-development with grid operators or energy storage specialists, where the mooring-to-grid interface is the natural claim anchor.
Search this in Eureka →E02D · Foundations and earth drilling
Foundations and anchor-drilling techniques account for only 27 records, a low share for a branch that is directly load-path-critical in floating wind design. Mooring anchor installation, seabed characterization, and hybrid foundation concepts for soft-sediment deep-water sites all have clear engineering relevance. This branch is adjacent to the dominant mooring and marine-vessel clusters and could be entered by applicants already active in B63B mooring subclasses looking to extend their claim coverage down to the seabed interface.
Search this in Eureka →How leaders differ by technology route across the key IPC branches
Strength of each leader across the main technology routes.
| Player | F03D 13 · Wind motors (wind turbines) | B63B 35 · Ships & marine vessels | B63B 21 · Ships & marine vessels | F03D 9 · Wind motors (wind turbines) | F03B 13 · Hydraulic machines & engines |
|---|---|---|---|---|---|
| University of Maine | Strong · 95 | Strong · 95 | Moderate · 31 | Moderate · 35 | Absent |
| Principle Power Inc | Strong · 17 | Strong · 33 | Absent | Moderate · 14 | Absent |
| IFP Energies Nouvelles | Strong · 22 | Strong · 26 | Absent | Absent | Moderate · 6 |
| Encomara Ltd | Absent | Strong · 14 | Strong · 18 | Absent | Absent |
| Ocean Energy Systems Ltd | Absent | Absent | Absent | Strong · 11 | Strong · 12 |
| RCAM Technologies Inc | Absent | Absent | Strong · 9 | Absent | Strong · 13 |
Frequently asked questions
The analysis covers 626 patent families. The United States is the lead filing office with 232 records, followed by Europe (EPO) with 147 and WIPO (PCT) with 116.
The University of Maine leads with 162 patent families — more than three times the output of the second-ranked IFP Energies Nouvelles at 41 patent families. The top five filers together account for 41% of the combined output of the hundred largest filers.
Annual filing volume peaked in 2021 at 110 records, up from 55 in 2017. Activity has since eased to the 70–90 range in 2023–2024. Figures for 2025 and 2026 are substantially under-counted due to publication lag and should not be treated as evidence of further decline.
Wind motors (F03D) and ships and marine vessels (B63B) are the two dominant classes, each with substantially more records than any other branch. Hydraulic machines (F03B) is a distant third, followed by hydraulic and waterway engineering (E02B) and electric motors and generators (H02K).
The United States leads with 232 records. Europe (EPO) and WIPO (PCT) are the next largest. Germany, the United Kingdom, and Canada also have meaningful coverage. China has only 7 records and Japan 5, which is notably thin relative to the offshore wind development activity in those regions.
Formal co-filing is sparse. The most active co-filing pair identified is the University of Maine and the Alliance for Sustainable Energy with 3 jointly filed patent families. Encomara Ltd and SLLP 134 Ltd have 2 co-filings. The overall collaboration network is thin across the corpus.
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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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