Circuit Breaker Mechanism Patents: Who Leads, Where the Gaps Are 2026
Circuit Breaker Operating Mechanism Patents: Filing Trends and Ownership
34.3% concentration. The five leading assignees together hold 224 of the 653 records in scope — a tight core around a long tail of smaller filers. Filings peaked at 26 in 2019 and have since settled into a lower, flat band — 7 filings in both 2021 and 2024, a 0% change over that span. Treat the 2025-2026 tail as incomplete rather than as a genuine drop-off.
- 1WESTINGHOUSE ELECTRIC CORP13.8%
- 2SQUARE D CO6.4%
- 3GENERAL ELECTRIC CO5.7%
- 4EATON INTELLIGENT POWER LTD4.4%
- 5LARSEN & TOUBRO LTD4.0%
See the full circuit breaker operating mechanisms 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 circuit breaker mechanism patents
Who are the leading patent holders in circuit breaker operating mechanisms?
Ownership is concentrated among long-established switchgear manufacturers, with the top five assignees together holding 224 of the 653 records in scope (34.3%) and the top ten holding 312 (47.8%). The single leading assignee holds 90 records, well ahead of fifth place at 26 and tenth place at 14, which marks a clear leader rather than several near-equal competitors. Beyond that core, the ranking extends to 100 companies, most holding only a handful of records each, so there is genuine room for newer entrants to build a position.
Is patent filing in circuit breaker mechanisms growing or slowing down?
Filing peaked at 26 records in 2019 and has since settled into a lower, flat band, with 7 filings recorded in both 2021 and 2024 — a 0% change over that span. Because publication lags filing by roughly 18 months, the 2025-2026 figures in the dataset are still incomplete and should not be read as an active decline. The honest read is a plateau after an earlier peak, not a shrinking field.
Which patent classes cover circuit breaker operating mechanisms?
The large majority of records, 83.9% of the 653 in scope, sit in H01H (switches and relays), reflecting the mechanical and switching-contact core of the field. Protective circuit arrangements (H02H) and power switchboards and substations (H02B) follow at 8.6% and 3.8% respectively, with measurement (G01R), grid systems (H02J), pulse logic (H03K), magnetics (H01F) and resistors (H01C) each covering a smaller slice. Because records can carry multiple classes, these shares add up to more than 100% of the record total.
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 Circuit Breaker Operating Mechanisms 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.