Non-Oriented Electrical Steel Patents: Top Companies & Trends 2026
Non-Oriented Electrical Steel Patents for Traction Motors
83.8% of all 10,514 records sit with the top five assignees combined — this field is unusually concentrated at the top rather than fragmented. Annual filings rose from 568 in 2017 to a peak of 917 in 2020, then eased; the last complete-year comparison, 2021 (761) to 2024 (552), is a 27% decline. Treat 2025 and 2026 as incomplete rather than as continued decline, since publication lag means recent filings are still arriving.
- 1NIPPON STEEL CORPORATION35.3%
- 2JFE STEEL CORP31.2%
- 3POHANG IRON & STEEL CO LTD12.7%
- 4ARCELORMITTAL SA2.5%
- 5BAOSHAN IRON & STEEL CO LTD2.0%
See the full non oriented electrical steel for traction motors 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
Who holds the most patents in non-oriented electrical steel for traction motors?
One assignee leads the ranking with 3,716 records out of 10,514 in scope, far ahead of the rest of the field — fifth place holds 214 and tenth place 89. The top five assignees combined account for 83.8% of all records, and the top ten reach 90.2%, which makes this one of the more concentrated materials landscapes rather than one with a long, even tail. Any competitive analysis in this space needs to start with that handful of holders rather than the full ranked list.
Is patent filing in non-oriented electrical steel slowing down?
Filings peaked in 2020 at 917 and the last complete-year comparison, 2021 to 2024, shows a 27% decline from 761 to 552. However, publication lags filing by roughly 18 months, so the 2025 and 2026 figures in any trend chart are still incomplete and should not be read as continued decline. The fairer statement is that filing activity has cooled from its 2020 peak through 2024, with the most recent years not yet fully visible.
Which technology areas carry the most patent claims in this field?
Heat treatment of metals (IPC class C21D) appears on 72.8% of the 10,514 records, and alloys (C22C) on 61.1%, making metallurgy and thermal processing the densest claim areas by a wide margin. Magnets, inductors and transformers (H01F) follow at 56.3%. By contrast, electric motors and generators (H02K) sit at just 8.8% and metal rolling (B21B) at 3.5%, meaning the finished-motor integration side of this technology is comparatively lightly claimed against the sheet metallurgy itself.
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 Non Oriented Electrical Steel for Traction Motors 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.