Solid State Circuit Protection Patents: Leaders & Trends 2026
Solid State Circuit Protection and Hybrid Breaker Patents
60.8% of filings sit with five assignees. 115 of 189 records in scope belong to the top five, a concentration that makes freedom-to-operate checks against a short list far more useful than a broad landscape scan. Filings rose to a peak of 52 records in 2019, then declined; 2021's 21 records fell to 6 by 2024, a -71% change over that span. 2025 and 2026 counts (down to 1 in 2026) are undercounts caused by publication lag rather than a real drop-off, since publication trails filing by roughly 18 months.
- 1EATON INTELLIGENT POWER LTD75
- 2XI AN JIAOTONG UNIV12
- 3SQUARE D CO10
- 4DREXEL UNIV10
- 5ELECTRIC POWER RES INST INC8
See the full solid state circuit protection and hybrid breakers 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
Who holds the most patents in solid state circuit protection and hybrid breakers?
The ranking covers 49 assignees, and it is heavily concentrated at the top: the leading assignee alone holds 75 of the 189 records in scope, compared with 8 at fifth place and 4 at tenth. Together the top five hold 60.8% of all records and the top ten hold 75.1%, so a small number of portfolios account for most of the field. Anyone doing competitive analysis here should start with that short list rather than the full ranking.
Is patent filing activity in hybrid circuit breakers growing or shrinking?
Filings peaked in 2019 at 52 records, then declined; the 21 records filed in 2021 fell to 6 by 2024, a -71% change. That said, publication typically lags actual filing by roughly 18 months, so the low counts shown for 2025 and 2026 understate real activity and should not be read as a market slowdown on their own. The 2021-2024 window is the most reliable recent comparison because those years are close to fully published.
What technology areas are most heavily claimed in this space?
H01H (switches and relays) and H02H (protective circuit arrangements) dominate, appearing in 59.3% and 51.3% of the 189 records respectively. Power conversion (H02M), grid systems (H02J), pulse/logic circuits (H03K) and measurement-related classes each appear in well under 15% of records. That gap suggests the core switching and protection mechanics are densely claimed while integration with power conversion and grid control is comparatively open.
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 Solid State Circuit Protection and Hybrid Breakers 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.