Magnetic Field Shielding Patents: Who Leads, Where the Gaps Are 2026
Magnetic Field Shielding at Low Frequency: Patents, Leaders and Open Claim Space
53.0% of all 83 records in scope sit with the five most active filers, and 77.1% sit with the ten most active — a field where a handful of assignees have staked out most of the claim space. Filings ran at 4 in 2017 and reached a peak of 6 in 2021, the high point for the dataset. Across the three complete years that follow, filings fell from 6 in 2021 to 2 in 2024, a 67% decline over that span. 2025 and 2026 show lower counts still, but those years are not comparable yet given publication lag.
- 1KLATT FREDERICK WILLIAM12
- 2MOJO MOBILITY INC10
- 3SKOPE MAGNETIC RESONANCE TECH AG8
- 4SEESCAN INC7
- 5MICRON TECHNOLOGY INC7
See the full magnetic field shielding at low frequency 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 this landscape
How concentrated is patent ownership in low-frequency magnetic field shielding?
It is concentrated at the top. The five most active assignees hold 53.0% of all 83 records in scope, and the ten most active hold 77.1%. Below that, the ranking runs to 33 companies total, with most holding only a handful of records each, so the field combines a dense top group with a long tail of occasional filers. Anyone entering this space should map their intended claims against that top-ten group first, since it accounts for more than three-quarters of the documented activity.
Is filing activity in magnetic field shielding growing or shrinking?
Filings peaked in 2021 at 6 for the year, then fell to 2 by 2024, a 67% decline across those three complete years. That is a genuine pullback in new filings over that period, though it does not by itself indicate the underlying engineering problem is resolved. The 2025 and 2026 counts in the dataset are lower still but should be read cautiously, since publication typically lags actual filing by around 18 months and those years are not yet complete.
Which technology areas carry the most patent claims in this field?
G01R, the electric and magnetic measurement classification, appears on 36.1% of the 83 records in scope, making it the single densest area. H05K printed-circuit assemblies (18.1%) and B60L electric vehicle propulsion (14.5%) follow, with power systems, motors and generators, medical diagnosis, geophysics and semiconductor devices each sitting near 10-12%. Because a single record can carry several IPC classes, these figures add to more than 100% of the record total, which is expected and reflects overlapping claim scope rather than double-counting error.
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 Magnetic Field Shielding at Low Frequency 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.