Contactor and Motor Starter Patents: Who Leads, Trends 2026
Contactor and Motor Starter Patents: Filing Concentration and Open Ground
62.9% of all 402 records sit with the five leading assignees, and 74.9% with the top ten — a field where a handful of switchgear majors hold most of the claim space. Filings rose from 4 in 2017 to a peak of 44 in 2020, then eased toward the most recent, still-partial filing year. With fewer than four complete years available after accounting for publication lag, no growth rate is calculable from this window — treat 2020 as the high-water mark rather than a stable run rate.
- 1ROCKWELL AUTOMATION TECH INC23.1%
- 2EATON CORP17.2%
- 3WESTINGHOUSE ELECTRIC CORP15.7%
- 4GENERAL ELECTRIC CO3.7%
- 5PANASONIC ELECTRIC WORKS CO LTD3.2%
See the full contactor and motor starter technology 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 this landscape
Who holds the most patents in contactor and motor starter technology?
The dataset’s assignee ranking covers 66 companies, and it is heavily top-loaded: the leading assignee alone holds 93 of the 402 records in scope, against 13 for the fifth-ranked company and 6 for the tenth. Combined, the top five assignees account for 62.9% of all 402 records, and the top ten account for 74.9%. This is a field where a small number of established switchgear manufacturers hold most of the claim space, rather than one spread evenly across many filers.
Is the contactor and motor starter patent field still growing?
Filing activity rose from 4 records in 2017 to a peak of 44 in 2020, then eased off toward the most recent tracked year. Because fewer than four complete years remain once the roughly 18-month publication lag is accounted for, no reliable growth rate can be calculated from the recent window. The shape of the trend suggests the most active filing period has already passed rather than being underway now.
What technology areas are under-claimed in this space?
The core switching mechanism, covered by IPC class H01H, appears in 86.8% of the 402 records and is clearly the densest area of prior art. Adjacent control and sensing functions are thinner by comparison: H02P (motor and generator control) sits at 11.2%, G01R (electric and magnetic measurement) at 9.7%, and H03K (pulse technique and logic circuits) at just 3.2%. Electronic coil holding-power control, welded-contact detection logic and contact bounce suppression circuits are reasonable places to look for open claim space relative to the core mechanical switching art.
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 Contactor and Motor Starter Technology 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.