Harmonic Analysis and Mitigation Patents: Filing Trends and Who Holds the Filter IP
Filing peaked in 2020 at 140 records, then eased to 84 by 2024 — an 18% pull-back over that three-year span, not a collapse in activity. Filings rose from 73 in 2017 to a peak of 140 in 2020, then declined to 103 in 2021 and 84 in 2024 — an 18% drop over that three-year window. 2025 and 2026 figures are still incomplete due to publication lag and should not be read as a continued fall.
- 1EDSA MICRO CORP4.6%
- 2TAE TECHNOLOGIES INC4.0%
- 3POWER ANALYTICS CORP2.7%
- 4HALLIBURTON ENERGY SERVICES INC2.3%
- 5ROCKWELL AUTOMATION TECH INC2.2%
See the full harmonic analysis and mitigation 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 harmonic mitigation patents
Who holds the most patents in harmonic filtering and mitigation?
The dataset's leading assignee holds 85 of the 1,836 records in scope, with a steep drop to 41 at fifth place and 24 at tenth. The top 5 assignees combined account for 15.8% of all records and the top 10 for 24.7%, which means no single company controls the field outright. Diligence work should look well beyond the ranked leaders, since the majority of filings sit outside the top 10.
Is patent filing activity in harmonic mitigation growing or slowing?
Filing peaked at 140 records in 2020, then declined to 103 in 2021 and 84 in 2024, an 18% drop over that span. That is a genuine cooling from the 2020 peak, not a collapse — 84 families a year is still substantial activity. Figures for 2025 and 2026 should be read with caution because publication typically lags filing by around 18 months.
Which patent classes cover the most harmonic mitigation filings?
H02J, power supply and grid systems, covers 45.0% of the 1,836 records, and H02M, power conversion, covers 38.0%. Motor and generator control (H02P), digital data processing (G06F) and variable control (G05F) each sit between 8% and 11%, with magnetics, measurement and EV propulsion below that. Because a single record can carry several IPC codes, these percentages add up to well over 100% of the record total and should not be read as mutually exclusive shares.
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 Harmonic Analysis and Mitigation 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.