Traction Inverter for Marine Propulsion Patent Landscape
The traction inverter for marine propulsion patent space is highly concentrated, with Transportation IP Holdings LLC alone accounting for the largest single block of patent records among the top filers. The field expanded sharply through 2021 and 2024 but has since eased, and the US remains the dominant jurisdiction by a wide margin.
Transportation IP Holdings leads a tightly consolidated field
Transportation IP Holdings LLC sits at the top of the applicant ranking with 43 patent records, followed by General Electric Co with 12 and a cluster of filers at 4–6 records each, including the University of Toronto, EleapPower Ltd, and GE Intellectual Property Licensing LLC.
The top five filers account for 60% of the combined total across the hundred largest filers, signaling a markedly consolidated competitive structure. A meaningful tier gap separates the leading bloc from the mid-field, leaving little neutral ground for challengers to accumulate positions incrementally.
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 1 | Transportation IP Holdings LLC | 43 | |
| 2 | General Electric Co | 12 | |
| 3 | The Governing Council of the University of Toronto | 6 | |
| 4 | EleapPower Ltd | 6 | |
| 5 | GE Intellectual Property Licensing LLC | 5 | |
| 6 | Bunker Hill Technologies LLC | 5 | |
| 7 | GM Global Technology Operations LLC | 5 | |
| 8 | Westinghouse Air Brake Technologies Corp | 4 | |
| 9 | NINGBO GEELY AUTOMOBILE RES & DEV CO LTD | 4 | |
| 10 | Zhejiang Geely Holding Group Co Ltd | 4 |
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 11 | Caterpillar Inc | 3 | |
| 12 | Progress Rail Locomotive Inc | 3 | |
| 13 | ABB (Schweiz) AG | 3 | |
| 14 | Kumar Ajith Kuttannair | 2 | |
| 15 | Cummins Inc | 2 | |
| 16 | King Robert Dean | 2 | |
| 17 | Hydrogenics Corp | 2 | |
| 18 | Ford Global Technologies LLC | 2 | |
| 19 | Volvo Truck Corp | 1 | |
| 20 | Tau Motors Inc | 1 |
The dominance of Transportation IP Holdings, which holds more than three times the records of the next-ranked filer, implies that any freedom-to-operate analysis or licensing strategy must begin with its portfolio. General Electric’s presence through two separate entities (GE Co and GE Intellectual Property Licensing LLC) reinforces the established players’ structural advantage.
Patent records from approximately the last 18–24 months are subject to publication lag and likely undercount actual recent filing activity; the 2025–2026 data points should be treated as provisional. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Burst filing pattern with electric vehicle propulsion dominating the technology mix
The annual filing trend reveals an uneven, burst-driven pattern rather than smooth growth, while the technology composition is overwhelmingly anchored in electric vehicle propulsion classification with secondary clusters in motor control and power conversion.
Annual filing trend
Activity rose from a low base in 2017–2019, spiked to 17 records in 2021, fell sharply in 2022, recovered to 17 again in 2024, and has dropped to single digits in 2025–2026. The 2025–2026 figures are subject to publication lag and should not be read as a confirmed trend. The overall recent-window growth rate is negative at -16%, consistent with a field that has eased from its peak years.
↗ Hover for values · click a bar to ask EurekaTechnology composition
B60L (electric vehicle propulsion) dominates at 97 patent records, dwarfing the next branches: H02P (motor and generator control) at 22, H02J (power supply and grid systems) at 16, and H02M (power conversion) at 16. Branches covering batteries and fuel cells (H01M), electric motors (H02K), and hybrid vehicle control (B60W) each contribute 9–10 records, pointing to secondary but meaningful sub-themes.
↗ 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.
Vehicle propulsion system
A propulsion circuit for a vehicle includes an engine, a generator, a power rectifier, a direct current (DC) bus, a propulsion battery system, and at least one converter. The generator is coupled to the engine and configured to receive an input from the engine, and to provide an alternating current (AC) output. The power rectifier is configured to receive… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | Electric drive vehicle retrofit system and associa… | 32 |
| 2 | Power supply management apparatus and method thereof | 22 |
| 3 | Vehicle electric supply system | 20 |
| 4 | Vehicle brake control system | 20 |
| 5 | Inverter-Based Head End Power System | 19 |
| 6 | Electrical system having a DC link | 16 |
| 7 | Power supply management apparatus and method thereof | 13 |
| 8 | System and method for reducing fuel consumption in… | 12 |
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.
What the patent structure means for R&D investment decisions
The combination of high concentration, a past-peak filing pace, and a US-centric jurisdiction footprint shapes where new entrants can realistically compete and where established players are most exposed to disruption.
Past-peak field with burst-driven rather than sustained growth
The lifecycle stage for this space is Decline, with annual filings having eased back from the 2021 and 2024 peaks. The multi-year recent-window growth is negative at -16%. New filers entering now face a field where the foundational positions have largely been staked out, making differentiation at the sub-technology level more critical than volume filing.
Lifecycle: DeclineTop five filers hold 60% of the hundred largest filers’ combined records
Transportation IP Holdings LLC alone accounts for 43 patent records, more than triple the next-ranked filer. This level of concentration means that freedom-to-operate and licensing risk assessments are dominated by a single portfolio. Challengers in the mid-field—each holding 4–6 records—have limited leverage without targeted portfolio-building in adjacent branches.
High concentrationUniversity-industry co-filing is the primary collaborative pattern
The most active co-filing pair is the Governing Council of the University of Toronto and EleapPower Ltd, sharing 6 jointly filed records. Zhejiang Geely Holding Group and Ningbo Geely Automobile Research & Development Co. Ltd. co-filed 4 records, reflecting intra-group coordination. General Electric Co and GM Global Technology Operations LLC (via a procurement entity) co-filed 2 records. Academic-industry linkage is therefore a structurally meaningful channel in this space.
Academic-industry linksUS-centric protection with selective EPO and PCT coverage
The United States accounts for 53 patent records, making it the clear primary filing destination. Europe (EPO) and WIPO (PCT) each have meaningful but smaller footprints at 16 and 10 records respectively. India and Australia round out the top five jurisdictions. The limited coverage in Germany and the UK relative to the EPO aggregate suggests that national European filings are secondary to the regional route. Filers seeking to challenge incumbents in non-US markets may find thinner coverage to navigate.
US dominantGo beyond the landscape: Eureka’s TRIZ Solution agent breaks down an R&D problem and returns patented concept solutions, each with a technical approach and cited patent & literature evidence.
| Applicant | Collaborator | Co-filings |
|---|---|---|
| The Governing Council of the University of Toronto | EleapPower Ltd | 6 |
| Zhejiang Geely Holding Group Co Ltd | Ningbo Geely Automobile Research & Development Co Ltd | 4 |
| General Electric Co | GM Global Technology Operations LLC | 2 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
Transportation IP Holdings and General Electric anchor the top tier
Two entities stand apart from the mid-field by a substantial margin. Transportation IP Holdings LLC holds the largest position by far, while General Electric Co maintains a significant presence concentrated entirely in electric vehicle propulsion sub-classes.
Transportation IP Holdings LLC
With 43 patent records, Transportation IP Holdings LLC is the single largest filer in this space, more than three times the next-ranked applicant. Its technology focus is squarely in B60L electric vehicle propulsion sub-classes (B60L50, B60L58, B60L15), spanning energy storage management and drive control. Recent momentum shows a –7% trend, indicating the portfolio is maturing rather than actively expanding.
patent records: 43General Electric Co
General Electric Co holds 12 patent records and concentrates its filings across B60L50, B60L11, and B60L15—all within the electric vehicle propulsion class—reflecting a deep but narrowly scoped position. GE Intellectual Property Licensing LLC adds a further 5 records, giving the broader GE entity cluster a combined presence second only to Transportation IP Holdings. No recent momentum data was available in the evidence for GE Co directly.
patent records: 12| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| GM Global Technology Operations LLC | 14 | ▼ -7% |
| GM Global Technology Operations LLC | 5 | ▲ new entrant |
| Zhejiang Geely Holding Group Co Ltd | 1 | ▲ new entrant |
| Ningbo Geely Automobile Research & Development Co Ltd | 1 | ▲ new entrant |
Power conversion and grid integration as under-served adjacent branches
Relative to the B60L propulsion core, several technically adjacent IPC branches show materially lower filing density, representing areas where new entrants or incumbents expanding scope may find thinner prior-art coverage.
H02M · Power Conversion (AC/DC)
H02M covers power electronics and AC/DC conversion—core enablers of any traction inverter architecture—yet accounts for only 16 patent records (roughly 7% of the branch-level distribution). Given that inverter topology design and switching efficiency are critical differentiators for marine duty cycles (variable load, high ambient humidity), the relative sparsity here suggests room for targeted filing around marine-specific converter designs. Caterpillar’s existing H02M7 entries provide a foothold, but the branch is not crowded by the leading filers.
Search this in Eureka →H02J · Power Supply & Grid Systems
H02J (power supply and grid integration) holds 16 patent records at roughly 7% share, despite shore-power connection, onboard microgrid management, and vessel-to-grid concepts being directly relevant to electrified marine vessels. Westinghouse Air Brake Technologies and ABB (Schweiz) AG both have H02J entries, but the branch is thinly populated relative to its functional importance. Filers with expertise in maritime microgrid or vessel energy management could find differentiated space here, particularly for hybrid diesel-electric and fully electric vessel architectures.
Search this in Eureka →How leading filers differ by technology sub-class emphasis
Route coverage across the main technology branches in the current evidence set.
| Player | B60L 50 · Electric vehicle propulsion | B60L 58 · Electric vehicle propulsion | B60L 15 · Electric vehicle propulsion | B60L 11 · Electric vehicle propulsion | B60L 1 · Electric vehicle propulsion |
|---|---|---|---|---|---|
| GM Global Technology Operations LLC | Strong · 17 | Strong · 14 | Moderate · 7 | Emerging · 1 | Moderate · 5 |
| General Electric Co | Strong · 16 | Absent | Moderate · 8 | Strong · 14 | Emerging · 3 |
| EleapPower Ltd | Strong · 6 | Strong · 6 | Moderate · 2 | Absent | Absent |
| The Governing Council of the University of Toronto | Strong · 6 | Strong · 6 | Moderate · 2 | Absent | Absent |
| GM Global Technology Operations LLC | Strong · 4 | Absent | Moderate · 2 | Absent | Absent |
| ABB (Schweiz) AG | Strong · 3 | Absent | Absent | Strong · 2 | Moderate · 1 |
| Caterpillar Inc | Strong · 3 | Absent | Absent | Strong · 2 | Absent |
Frequently asked questions
The analysis covers 64 patent families. This corpus defines the competitive footprint for traction inverter technology as applied to marine propulsion across global filings.
Transportation IP Holdings LLC is the top filer with 43 patent records, more than three times the next-ranked applicant, General Electric Co, which holds 12 records. The top five filers together account for 60% of the hundred largest filers’ combined total, indicating a highly concentrated field.
The evidence classifies this field as Decline, with annual filings having eased back from peaks in 2021 and 2024. The recent-window growth rate is -16%. Publication lag means that 2025–2026 data is incomplete and should be treated as provisional.
The United States is the dominant filing jurisdiction with 53 patent records. Europe (EPO) and WIPO (PCT) each have secondary but meaningful presence at 16 and 10 records respectively. India and Australia are the next-largest markets. National European filings in Germany (4 records) and the UK (2 records) are limited relative to the EPO route.
Yes. The most active co-filing pair is the Governing Council of the University of Toronto and EleapPower Ltd, sharing 6 jointly filed records. Zhejiang Geely Holding and Ningbo Geely Automobile R&D co-filed 4 records, and General Electric Co co-filed 2 records with a procurement-affiliated entity. Academic-industry collaboration is a notable structural feature.
H02M (power conversion/AC-DC) and H02J (power supply and grid systems) each account for only 16 patent records—roughly 7% each of the branch-level distribution—despite their direct relevance to inverter design and marine microgrid integration. H01M (batteries and fuel cells) and H02K (electric motors and generators) are also relatively sparse at 10 records each.
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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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