Large Casting Production Patents: Top Filers & Filing Trends 2026
Large casting production patents: who holds the gating, moulding and repair claims
Concentrated but not locked up. the top 5 assignees account for 30.2% of all 215 records in scope, and the top 10 for 50.2% — leaving roughly half the field to a long tail of single- and low-count filers. From a 2021 count of 7 to 13 in 2024 — an 86% rise over three years — filing activity in large casting production has been building rather than tapering off. Treat 2025 and 2026 figures as provisional; they will revise upward as publications catch up.
- 1FOSECO INTERNATIONAL LTD20
- 2ANHUI UNIV OF SCI & TECH12
- 3LIU JUREN11
- 4COMALCO ALUMINUM LTD11
- 5WANG YUXIN11
See the full large casting production 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 large casting production patents
Who are the leading patent holders in large casting production?
The dataset’s assignee ranking covers 100 companies, with a single leader holding 20 records ahead of a fifth-place holder at 11 and a tenth-place holder at 7. The top 5 assignees together account for 30.2% of all 215 records in scope, and the top 10 account for 50.2% — a graded concentration rather than a single dominant player. That leaves roughly half the field spread across a long tail of smaller filers, so competitive monitoring needs to extend beyond the largest names.
Is patent filing activity in large casting production increasing or slowing down?
Filings rose from 7 in 2021 to 13 in 2024, an 86% increase over that three-year span, indicating growing rather than shrinking activity. The years after 2024 appear lower in the published data, but that reflects the roughly 18-month lag between filing and publication rather than an actual slowdown. 2024 should be treated as the most recent year with a reasonably complete count.
What technology areas dominate large casting production patents?
Foundry moulding (IPC class B22C) appears in 63.7% of the 215 records and metal casting (B22D) in 53.5%, making these two classes the technical core of the field. Alloys (C22C) cover 9.8% of records, while steelmaking, furnace details, plastics shaping and engine-cylinder classes each sit at under 4%. Because a single record can carry multiple IPC classes, these shares add up to more than 100% and should not be read as mutually exclusive segments.
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 Large Casting Production 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.