Cold Rolling Mill Patents: Top Companies & Filing Trends 2026
Cold Rolling Mill Patents: Who Leads and Where Filings Concentrate
31.0% of all 458 records sit with just five assignees, and 45.9% with ten — this field concentrates fast at the top. Filings ran from 32 in 2017 to a peak of 43 in 2019, before easing to 5 in the still-incomplete 2026 count. The 2021-to-2024 window, the most recent comparison unaffected by publication lag, shows a 29% decline from 17 to 12.
- 1JSW STEEL LTD47
- 2NIPPON STEEL CORPORATION34
- 3DANIELI & C OFFICINE MECCANICHE SPA24
- 4SMS GROUP GMBH21
- 5QUAKER CHEMICAL CORPORATION16
See the full cold rolling mill 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 cold rolling mill patents
Who holds the most cold rolling mill patents?
One assignee leads with 47 records in this dataset, well ahead of the fifth-ranked company at 16. The top 5 assignees combined hold 31.0% of all 458 records in scope, and the top 10 hold 45.9%. Below that, filing activity spreads thinly across a long tail of the remaining ranked companies, most holding only a handful of records each.
Is cold rolling mill patent activity growing or declining?
Filings peaked at 43 in 2019 and the most recent complete comparison, 2021 to 2024, shows a 29% decline from 17 to 12 records. However, publication typically lags filing by around 18 months, so the 2025 and 2026 counts in any trend chart are still incomplete and should not be read as continued decline. A clearer read on the current trajectory will only be available once those years finish publishing.
What technology areas overlap most with cold rolling mill claims?
Metal rolling itself (IPC class B21B) covers 57.0% of the 458 records in scope, but alloy composition claims (C22C) appear in 26.2% and heat treatment claims (C21D) in 22.9%. This overlap means a rolling equipment or process patent is frequently filed alongside, or in combination with, material composition or thermal treatment claims rather than standing alone as a pure mechanical filing.
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 Cold Rolling Mill 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.