Traction Inverter Gate Driver Patent Snapshot 2026
The traction inverter gate driver patent space is highly concentrated, with ROHM Co., Ltd. holding a commanding lead and activity emerging only from 2022 onward. The field is nascent, fast-forming, and dominated by semiconductor IP specialists rather than OEMs.
ROHM leads a tightly held, early-stage field
ROHM Co., Ltd. ranks first with 8 patent families, followed by STMicroelectronics International with 3, and Allegro MicroSystems and Volvo Car Corporation each with 1. The top five filers account for 100% of the ranked applicants visible in this query’ combined total, signaling an extremely concentrated visible assignee structure.
A clear two-tier gap separates ROHM from the rest: its family count is more than double the nearest rival. STMicroelectronics holds a distant second position, while Allegro and Volvo each have a single-family footprint, representing early or exploratory entry.
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 1 | ROHM Co., Ltd. | 8 | |
| 2 | STMicroelectronics International N.V. | 3 | |
| 3 | Allegro MicroSystems LLC | 1 | |
| 4 | Volvo Car Corporation | 1 |
ROHM’s scale advantage implies it holds foundational isolated gate driver architecture claims that later entrants will need to design around or license. The absence of major automotive Tier-1 suppliers in the ranking suggests the competitive frontier is still being set by semiconductor companies rather than system integrators.
The most recent filing years are likely under-counted due to standard patent publication lag; the corpus of 13 patent families should be read as a minimum floor for current activity, not a ceiling. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Activity ignited in 2022 and the technology mix centers on power conversion
Filing activity was absent before 2022 and then accelerated sharply, reflecting the rapid commercialization of high-voltage SiC/GaN-based traction inverters. The technology composition shows power conversion circuits as the visible branch, with adjacent EV propulsion and pulse-technique classes rounding out the mix.
Annual filing trend
No families were recorded before 2022; four appeared in 2022 and seven in 2023, marking the field’s inception. The 2024 and 2026 readings appear as zero and the 2025 figure of two should be treated as preliminary given publication lag — the true recent-year total is likely higher.
↗ Hover for values · click a bar to ask EurekaTechnology composition
H02M (power conversion) anchors every family in scope. B60L (electric vehicle propulsion), H02P (motor and generator control), and H03K (pulse technique and logic circuits) each appear in roughly one-third of families, confirming that gate driver IP straddles power electronics, vehicle systems, and digital control logic. H02H (protective circuit arrangements) is the smallest branch, present in only two records.
↗ Hover for values · click a bar to ask EurekaHighly cited patent families surfaced by the query
Citation-heavy patent families returned by the query. Use this section as citation context, not as a curated list of the most topic-specific patents.
Isolated gate driver, traction inverter, and elect…
An isolated gate driver has: a switch connection terminal configured to have a switching element externally connected to it; a non-volatile memory having adjustment data written to it; a register configured to store the adjustment data read from the non-volatile memory; a gate driving circuit configured to drive the gate of the switching element with a… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | Isolated gate driver, traction inverter, and elect… | 7 |
| 2 | Isolated gate driver, traction inverter, and elect… | 5 |
| 3 | Insulated gate driver, traction inverter, and elec… | 3 |
| 4 | Isolated gate driver, traction inverter, and elect… | 2 |
| 5 | Insulated gate driver, traction inverter, and elec… | 2 |
Ranked by total forward citations. Citation counts favour older and broadly cited patent families, and broad or adjacent patents may appear when they match the search scope. Treat this section as citation context, not as a curated list of the most topic-specific patents. Some patent titles may be shown in their original, non-English language where an accurate translation could not be guaranteed.
Assignee snapshot from the current evidence set
The applicants below are visible in this query result. Because the evidence set is relatively small, read this section as a directional snapshot rather than a full competitive ranking.
ROHM Co., Ltd.
ROHM holds 8 patent families — the largest position in the corpus by a wide margin — concentrated in H02M power conversion and H03K pulse technique and logic circuits. Its applicant momentum is flagged as a new entrant, indicating all families appeared within the recent filing window with no established prior base. This suggests ROHM has built its position rapidly and deliberately, likely in parallel with SiC gate driver product development.
families: 8STMicroelectronics International
STMicroelectronics International holds 3 patent families, with technology focus uniformly across B60L electric vehicle propulsion sub-classes (B60L 15, B60L 3, and B60L 50), distinguishing it from ROHM’s circuit-level emphasis. Its momentum is also classified as a new entrant. This EV-system framing suggests STMicroelectronics is positioning its gate driver IP as part of broader traction system solutions rather than standalone semiconductor components.
families: 3Frequently asked questions
The current corpus contains 13 patent families in scope. Given standard patent publication lag, the true total for the most recent filing years is likely higher than the indexed count suggests.
ROHM Co., Ltd. leads with 8 patent families, accounting for the largest single-applicant share among all ranked filers. STMicroelectronics International is the next-largest holder with 3 families.
No families were recorded before 2022. Activity emerged in 2022 with 4 families and peaked in indexed data at 7 families in 2023, making this a very recently formed patent space.
The United States is the primary filing destination with 8 patent records, followed by Japan and WIPO (PCT) with 2 each and Europe (EPO) with 1. Coverage outside the US remains limited.
H02M (power conversion) covers every family in scope, establishing it as the foundational IPC class. B60L (electric vehicle propulsion), H02P (motor and generator control), and H03K (pulse technique and logic circuits) are each present in a meaningful share of families as secondary classifications.
No co-applicant or collaborative filing activity is detected in the current corpus. All families are attributed to single assignees, suggesting that development in this field is currently proprietary and siloed within individual semiconductor companies and OEMs.
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Disclaimer. This page is generated from PatSnap Eureka data drawn from a limited snapshot of global patent and scientific-literature records, and is provided for general information and reference only.
Patent data carries inherent limitations: recent filings (typically the most recent 18–24 months) are under-counted due to standard publication lag; counts may be reported at either a patent-family or a patent-record basis and are not always directly comparable; classification, applicant-name, and citation data may contain errors, duplicates, or omissions; and the underlying search query defines and constrains the scope shown. As a result, the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
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