Arc Fault Detection Patents: Top Companies & Filing Trends 2026
Arc Fault Detection Device Patents: Who Leads and Where Claims Concentrate
51.4% of all 665 records sit with just five assignees, so a freedom-to-operate check starts with a short list, not a broad search. Annual filings ran from 25 in 2017 to a peak of 44 in 2023. Using 2021-to-2024 as the last complete window, volume grew +7%, essentially flat rather than falling — the smaller 2025-2026 counts reflect publication lag, not a slowdown.
- 1SCHNEIDER ELECTRIC USA INC147
- 2EATON CORP62
- 3SIEMENS INDUSTRY INC51
- 4EATON INTELLIGENT POWER LTD51
- 5DG MATRIX31
See the full arc fault detection devices 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 about arc fault detection patents
Who holds the most patents on arc fault detection devices?
Filing activity in this field is concentrated: the top-ranked assignee alone holds 147 of the 665 records in scope, and the top five combined hold 342 records, or 51.4% of the total. That leaves a long tail of smaller filers across the remaining 100-company ranking. Anyone doing competitive tracking should watch the top handful of names closely, since the drop after fifth place is steep — fifth place sits at only 31 records.
Is arc fault detection patent filing still growing?
Filing volume has been roughly flat rather than declining. Using 2021 (29 filings) to 2024 (31 filings) as the last complete comparison window, growth was +7%, and the peak year so far was 2023 at 44 filings. The lower counts shown for 2025 and 2026 are a publication-lag effect — patent applications typically publish around 18 months after filing — not evidence that inventive activity is slowing.
What technology areas within arc fault detection are least covered by existing patents?
AI-based detection methods, classified under G06N, appear in only 2.1% of the 665 records, and photovoltaic-specific arc detection (H02S) sits at 5.1%, both well below the 67.4% share held by general protective-circuit claims (H02H). That gap suggests algorithmic classification approaches and PV-string-specific test methods are less densely claimed relative to the size of those application areas, making them worth a closer freedom-to-operate and drafting review.
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 Arc Fault Detection Devices 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.