High Voltage Systems for Off Highway Patents: Leaders & Trends 2026
- 60.0% concentration. The top 5 of 23 ranked assignees account for 39 of the 65 records in scope — filing is concentrated at the top with a long tail below.
- Filing nearly doubled. Recorded filings rose from 4 in 2021 to 9 in 2024, a +125% increase over that three-year span, before the most recent, still-incomplete years.
- Harness and connector claims dominate. B60L propulsion and H01M battery classes each cover roughly a third of records, but H01R connector claims still sit on a 23.1% share worth checking before filing.
Filing growth compares 2021 (4 records) with 2024 (9) — a three-year span. 2024 is the most recent year we treat as complete: publication lags filing by roughly 18 months, so 2025 onwards are still filling in and any growth rate that ends there would understate the field. Top-5 share is the combined record count of the five largest assignees divided by all 65 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
This landscape tracks patent filings at the intersection of high voltage interlock, insulation resistance monitoring and high voltage harness design, cross-referenced against potential equalization, ingress protection, electromagnetic compatibility, service disconnect switching and arc flash protection. These are the safety and integration systems that sit between a high voltage battery pack or drivetrain and the rest of an electrified vehicle platform — on-highway or off. The 65 records in scope span 2015 through the current data cut-off, with United States and European filings dominating the receiving-office mix.
Because publication lags filing by roughly 18 months, the last one to two years of the trend understate real filing activity; treat 2024 as the most recent complete year and read anything after it as a floor, not a ceiling.
Filing trend and technology composition
Two views of the same 65-record dataset: how filing activity has moved year over year, and which IPC subclasses carry the claims.
Filing trend, 2015-2026
Filings climbed from 4 in 2021 to a peak of 9 in 2024 (+125% over that span). 2017 opened at zero recorded filings; treat 2025 and 2026 as undercounted given publication lag.
IPC subclass composition
B60L (electric vehicle propulsion) leads at 49.2% of the 65 records, with B60K vehicle propulsion and H01M batteries each at 30.8%. Connector-specific claims under H01R sit at 23.1%, alongside B60R vehicle accessories at the same share. Measurement (G01R) and circuit assembly (H05K) classes trail at 6.2% each — records can carry multiple classes, so shares sum above 100%.
Shares are the percentage of the 65 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on High Voltage Systems for Off Highway with Eureka
This page is one run against one query. Ask Eureka your own question about high voltage systems for off highway and every answer comes back with the patent numbers behind it.
Try EurekaRepresentative and most-cited filings
Harness routing structure for vehicle — US7561445B2
A high-voltage harness routing structure includes a subframe, a driving power unit, an electric power distribution unit and an electrical auxiliary unit arranged so the driving power unit sits between the distribution unit and the auxiliary unit. The high voltage harness drops from the electric power distribution unit toward the subframe and then runs along the subframe in the vehicle-width direction, with a driving power unit mount forming part of the structural path.Filed by Nissan, granted 2009 — an early anchor claim on physical harness routing geometry relative to the subframe and drive unit.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20200298722A1 | Methods and systems for an integrated charging system for an electric vehicle | 209 |
| 2 | US20150365003A1 | Power Conversion System | 180 |
| 3 | US20150217707A1 | High-voltage harness connection structure for electrically driven vehicle | 54 |
| 4 | US20150318640A1 | High Voltage Connector Assembly | 42 |
| 5 | US8944865B1 | Water sensing interlock systems and methods for hybrid marine vessels | 38 |
| 6 | US20230261331A1 | A battery module and a vehicle | 37 |
| 7 | US7561445B2 | Harness routing structure for vehicle | 37 |
| 8 | US20070119637A1 | Harness routing structure for vehicle | 36 |
| 9 | US9260065B2 | High-voltage harness connection structure for electrically driven vehicle | 20 |
| 10 | US20150229080A1 | Integrated power output service disconnect | 19 |
Citation counts reflect influence within the searched corpus and favour older filings; they are not a measure of current commercial relevance.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Browse MCP servers →What the numbers mean for a filing decision
Three figures from this dataset shape where a new filing is likely to clear and where it will land on dense prior art.
Filing sits with a small group, not a single owner
The top 5 of 23 ranked assignees hold 39 of the 65 records in scope, and the top 10 extend that to 83.1%. That leaves a genuine long tail below tenth place, where single-digit and single-filing entrants operate — useful territory for a newcomer building a freedom-to-operate map.
Activity nearly doubled into 2024, then the record thins out
Recorded filings grew from 4 in 2021 to 9 at peak in 2024. Because publication lags filing by around 18 months, 2025-2026 figures are not yet complete and should not be read as a slowdown.
Propulsion and battery classes carry the bulk of claims
B60L electric vehicle propulsion appears in roughly half of all records, with B60K and H01M each near a third. Connector-specific claims under H01R and accessory claims under B60R sit lower at 23.1% each, suggesting comparatively less-crowded claim space around physical connector and enclosure design than around propulsion-level control.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to high voltage systems for off highway, with the prior art for and against each one.
Who is filing, and where the activity has cooled
Filing leadership sits with a handful of automotive and harness-component manufacturers; recent-year momentum has slowed across the assignees tracked here.
One filer sits well ahead of the field
The leading assignee holds 20 of the 65 records in scope, roughly half again the combined total of positions five through ten. That scale reflects a platform-wide filing strategy across harness, interlock and connector subsystems rather than a single product line.
A cluster holds mid-single-digit positions
Fifth place in the ranking holds 4 records, and tenth place holds 2 — the drop from leader to fifth place is steep, then the field flattens into a long tail of narrower, more specific filings.
Recent-year filing has gone quiet across the board
Every assignee tracked for recent-year momentum shows zero filings in the latest year, with one recording a -100% year-on-year change. Given the roughly 18-month publication lag, this is most plausibly a reporting gap rather than an actual halt in R&D activity.
| Assignee | Recent year | YoY |
|---|---|---|
| Nissan Motor Co., Ltd. | 0 | — |
| Yazaki North America, Inc. | 0 | — |
| Bombardier Recreational Products Inc. | 0 | — |
| Ford Global Technologies, LLC | 0 | — |
| Yazaki Corporation | 0 | — |
| Rivian IP Holdings, LLC | 0 | -100% |
| Rivian Holdings, LLC | 0 | — |
| Scania CV AB | 0 | -100% |
Where to take this analysis
This landscape identifies concentration and gaps; turning that into a filing or freedom-to-operate decision takes closer claim-level review.
Map claims against the long tail
The 83.1% held by the top 10 assignees leaves single-filing entrants below that line — worth a closer look before assuming a sub-area is clear.
Explore the assignee rankingTrack the connector and interlock branches
H01R and G01R classes carry lower record shares than propulsion classes, which may reflect genuine white space rather than lack of interest.
Review IPC compositionRead the most-cited filings in full
Citation counts here favour older records; read the underlying claims before treating a highly-cited filing as still governing the field.
Open the key patents tableCommon questions about this landscape
Filing in this dataset is concentrated: the leading assignee holds 20 of the 65 records in scope, and the top 5 of 23 ranked assignees together hold 39 records, or 60.0% of the field. That leaves a long tail below tenth place made up of assignees with only a handful of filings each. Anyone assessing freedom to operate should treat the leader's portfolio as the first stop, then check the long tail for narrower but still-relevant claims.
Recorded filings grew from 4 in 2021 to a peak of 9 in 2024, a +125% increase over that span, which points to genuine growth through the last complete filing year. The 2025 and 2026 figures look lower, but publication typically lags filing by around 18 months, so those recent years are still filling in rather than showing an actual decline. Judge momentum against 2024, not against the most recent data point.
B60L, covering electric vehicle propulsion, appears in 49.2% of the 65 records in scope, making it the single most-claimed area. B60K vehicle propulsion and drive, and H01M batteries and cells, each sit at 30.8%, indicating dense coverage across the drivetrain and battery interface. Connector and accessory classes such as H01R and B60R sit lower at 23.1% each, which is a useful signal for where claim space is comparatively less occupied.
US7561445B2, filed by Nissan and granted in 2009, claims a specific physical routing structure: a high voltage harness that drops from an electric power distribution unit toward a subframe and then runs along that subframe in the vehicle-width direction, with a driving power unit mount forming part of the arrangement. It does not claim high voltage harness routing as a general concept — it claims that particular geometric relationship between the distribution unit, the auxiliary unit and the subframe. A different physical routing path, or a different relationship between the drive unit and the distribution and auxiliary units, sits outside its literal claim scope, though a design-around should still be checked against the full claim set rather than the abstract alone.
The evidence points to insulation resistance monitoring circuitry, service disconnect switch interlock logic, arc flash protection enclosure design, potential equalization busbar routing and EMC shielding for harness bundles as comparatively thin relative to the propulsion- and battery-heavy core of this landscape. These branches show up in the search criteria but do not dominate the IPC composition the way B60L and H01M do. That gap does not guarantee an easy grant — it means the claim space is less crowded, not that no relevant prior art exists, so a novelty search specific to the sub-area is still necessary before filing.
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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.
Nothing on this page constitutes an exhaustive prior-art, novelty, freedom-to-operate, or validity search, nor does it constitute legal, financial, investment, or professional advice, and it should not be relied upon as such. Any patent, commercial, or strategic decision should be verified independently and reviewed with qualified patent, legal, and domain professionals. Patsnap makes no warranties, express or implied, as to the accuracy, completeness, or fitness for any particular purpose of the information presented.
Machine translation. Assignee and organisation names originally recorded in Chinese, Japanese or Korean have been rendered into English by an AI translation step so that the tables stay readable. These renderings are best-effort and may not match a company’s registered English name; the original name is what the underlying patent record carries, and it is what any Eureka query launched from this page uses.