Carbon Pultruded Spar Cap Patents: Top Companies & Trends 2026
Carbon Pultruded Spar Cap Patents: Who Leads and Where Filings Are Heading
60.8% concentration. The top 5 of 54 ranked assignees hold 220 of the 362 records in scope — filing here is not a fragmented field. Filings climbed to a peak of 53 in 2018, then contracted; the tracked decline of 38 (2021) to 10 (2024) is a 74% fall over that three-year span. 2025 and 2026 figures are still incomplete due to publication lag and should not be treated as a continuation of the drop.
- 1VESTAS WIND SYSTEMS AS69
- 2LM WIND POWER AS50
- 3GENERAL ELECTRIC CO38
- 4BLADE DYNAMICS LTD32
- 5SIEMENS GAMESA RENEWABLE ENERGY SERVICE GMBH31
See the full carbon pultruded spar cap technology analysis in Eureka
- The complete ranking, not just the top five
- Every IPC branch with its share of the corpus
- The most-cited records, and where claim space is still thin
Common questions on carbon pultruded spar cap patents
Who are the leading patent holders in carbon pultruded spar cap technology?
The field is concentrated: the top 5 of 54 ranked assignees hold 220 of the 362 records in scope, or 60.8%. The top-ranked assignee alone holds 69 records, well ahead of the fifth-place holder at 31. Below the top 10, which together hold 81.5% of records, filing volume per company drops sharply into single digits, so the practical competitive set for freedom-to-operate purposes is small.
Is patent filing in this area growing or slowing down?
Filings peaked in 2018 at 53 in a year, then declined; from 2021 (38) to 2024 (10) volume fell 74%. 2024 is the last year that can be treated as complete, because publication typically lags actual filing by around 18 months. That means the apparent drop in 2025 and 2026 in raw counts is partly an artefact of records not yet being published, not necessarily a real slowdown in R&D activity.
What technology areas overlap most with spar cap patents?
Beyond the core wind-turbine classification (F03D, 59.9% of records), plastics-shaping process claims (B29C, 53.0%) are nearly as common, meaning many filings protect the manufacturing process alongside the structural component. Specific plastic articles (B29D, 29.6%) and layered laminates (B32B, 11.3%) also appear regularly. Smaller but active overlaps exist with aerospace (B64C, 6.9%) and woven fabrics (D03D, 5.2%), pointing to adjacent reinforcement and layup techniques worth checking separately.
Disclaimer. This analysis is based on Patsnap Eureka data drawn from a limited snapshot of global patent records and is provided for general information and reference only. Patent data carries inherent limitations — recent filings are under-counted because of publication lag, counts may be on a record or family basis, classification and applicant-name data may contain errors or duplicates, and the underlying search query defines the scope shown — so the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
Nothing here is an exhaustive prior-art, novelty, freedom-to-operate or validity search, nor does it constitute legal, financial or professional advice, and it should not be relied upon as such. Verify independently and review with qualified patent and legal professionals before acting on it.
Method: Filing trend and technology composition. Derived from a Patsnap search on Carbon Pultruded Spar Cap Technology covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish. Every share divides by all records in scope. Data: Patsnap Eureka. See the full landscape report.