Thermal Management Patents: Top Companies & Filing Trends 2026
- Concentration is shallow. the leader holds 935 records but the ranked top 5 combine for just 5.5% of all 69,361 records in scope — this field is not a two-company race.
- Filing growth has plateaued, not collapsed. complete-year data shows 2021 to 2024 filings up only 5%, from 1,275 to 1,341, after a 2022 peak of 1,637.
- Momentum has flipped since the peak. several formerly active filers, including large electronics and automotive names, show year-over-year drops of 80-94% in the latest tracked year.
Filing growth compares 2021 (1,275 records) with 2024 (1,341) — 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 69,361 records in scope (CR5), not by the ranked leaders only.
What the thermal management patent record shows
Thermal management sits at the intersection of mechanical heat transfer and the electronics, battery and vehicle systems that generate the heat. The dataset behind this page spans 69,361 published records from 2015 through the 2026 cut-off, captured where thermal control terminology overlaps with sensing, working-fluid and energy-efficiency language. That intersection pulls in filers from semiconductor packaging, data-centre cooling, vehicle HVAC and battery thermal control alike, which is why the technology composition below spreads across battery, circuit-board, semiconductor and vehicle-heating classes rather than clustering in one.
Filing activity rose through the late 2010s, peaked in 2022, and has since settled into a narrow band on a complete-year basis. Publication lag means the last one to two years in any trend undercount true filing activity, so the apparent recent dip should be read with that lag in mind rather than as a real slowdown.
Filing trends and technology composition
Two views of the same 69,361-record corpus: how filing volume has moved year over year, and how records distribute across IPC subclasses.
A 2022 peak followed by a plateau
Annual filings climbed from 786 in 2017 to a peak of 1,637 in 2022. On the complete-year data, 2021 to 2024 filings grew only 5% (1,275 to 1,341), and the low counts shown for 2025-2026 reflect publication lag rather than a real drop in filing activity.
Composition spreads across eight core IPC subclasses
Batteries and cells (H01M, 3.7% of records) and printed circuits (H05K, 3.2%) lead the mix, followed closely by digital data processing (G06F) and semiconductor devices (H01L). Vehicle-specific classes (B60H, B60L) and heat-exchange apparatus (F28D) each sit near or above 2% of records, confirming that thermal management patenting is genuinely cross-sector rather than concentrated in one hardware category.
Shares are the percentage of the 69,361 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Thermal Management Patent Landscape with Eureka
This page is one run against one query. Ask Eureka your own question about thermal management patent landscape and every answer comes back with the patent numbers behind it.
Try EurekaMost-cited records and a representative filing
US20180372424A1 — Vapor chamber that emits a non-uniform radiative heat flux
A vapor chamber that emits a non-uniform radiative heat flux. The vapor chamber may have a convection cavity that contains a working fluid and outer surfaces that have two or more emissivity regions to dissipate heat from the working fluid at non-uniform levels of radiative heat flux. The non-uniform levels of radiative heat flux may result from exposure to emissivity decreasing surface treatments and/or emissivity increasing surface treatments. The vapor chamber may be utilized in thermal management systems to protect heat-sensitive components from thermal radiation that results from heat being dissipated from a heat source.Filed by Microsoft Technology Licensing, LLC, published 2018-12-27.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US9237921B2 | Devices and techniques for cutting and coagulating tissue | 1,566 |
| 2 | US9241731B2 | Rotatable electrical connection for ultrasonic surgical instruments | 1,516 |
| 3 | US9439668B2 | Switch arrangements for ultrasonic surgical instruments | 1,438 |
| 4 | US9724118B2 | Techniques for cutting and coagulating tissue for ultrasonic surgical instruments | 1,391 |
| 5 | US20100327766A1 | Wireless emergency lighting system | 996 |
| 6 | US20110133655A1 | Autonomous grid shifting lighting device | 934 |
| 7 | US20060022214A1 | LED package methods and systems | 854 |
| 8 | US6391251B1 | Forming structures from CAD solid models | 833 |
| 9 | US20120080944A1 | Grid Shifting System for a Lighting Circuit | 754 |
| 10 | US5560362A | Active thermal control of ultrasound transducers | 750 |
Citation counts favour older filings simply because they have had more time to accumulate citations within the searched corpus; treat them as a signal of influence rather than of current technical importance.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Three patterns stand out once concentration, growth and technology mix are read together.
Leadership is real but shallow
The leading assignee holds 935 records, more than three times the tenth-place filer's 475, so there is a genuine leader. But the ranked top 5 together account for only 5.5% of all records in scope, and the top 10 for 9.2% — this is a field with a long tail of active filers rather than one dominated by a handful of firms.
Plateau after the 2022 peak
Annual filings peaked at 1,637 in 2022 before settling back; the complete-year comparison from 2021 to 2024 shows only 5% growth. Read the sharp-looking decline in 2025-2026 as a publication-lag artefact, not a real contraction in filing activity.
Battery thermal control leads a broad mix
H01M edges out H05K (printed circuits, 3.2%) as the single largest IPC subclass, but no class exceeds 4% of records, and eight distinct subclasses each carry meaningful share. That spread signals thermal management patenting is being driven by adjacent industries — battery, electronics packaging, vehicle systems — rather than a single core technology.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to thermal management patent landscape, with the prior art for and against each one.
Who is filing, and where activity is cooling
The ranked leaders span electronics, semiconductor and automotive OEMs rather than a single sector, and several of the most active filers historically now show sharp year-over-year pullbacks.
Broad pullback among historically active filers
Multiple assignees that built substantial portfolios in this space, spanning electronics, software and automotive OEMs, show year-over-year filing drops of roughly 83-94% in the latest tracked year. This lines up with the publication-lag effect: the true 2025-2026 filing picture is still filling in, but the direction of travel among formerly high-volume filers is consistent.
Automotive OEM-supplier pairing dominates co-filing
Of the 10 co-assignee pairs in the dataset, the strongest by a wide margin links two major automotive manufacturers at 252 shared filings, with a supplier appearing in two further pairs at 10 filings each. Co-filing here reflects OEM-Tier 1 thermal system integration work rather than cross-industry collaboration.
US filings dominate, EPO and WIPO follow
The United States receiving office accounts for far more records than any other, with the European Patent Office (3,636) and WIPO/PCT (2,737) next, and Canada, Australia and the UK each in the 500-650 range. Filers targeting broad protection should expect the densest prior art at the USPTO.
| Assignee | Recent year | YoY |
|---|---|---|
| General Electric Company | 2 | -83% |
| Intel Corporation | 1 | -88% |
| Microsoft Technology Licensing, LLC | 1 | -91% |
| Hyundai Motor Company | 1 | -94% |
| Kia Corporation | 1 | -94% |
| Contemporary Amperex Technology Co., Ltd. (CATL) | 1 | -88% |
| Ford Global Technologies, LLC | 0 | -100% |
| Dell Products L.P. | 0 | — |
Where to take this next
The trend and ranking data point to specific next steps depending on whether you are scoping freedom-to-operate or looking for filing opportunities.
Check claim scope on the most-cited records
The five most-cited records in this corpus, several tied to ultrasonic surgical instruments and emergency lighting rather than core thermal hardware, show how citation influence can sit outside the obvious technology core. Reviewing their claim language before filing avoids surprises.
Explore cited records in EurekaMap the under-claimed branches against your own roadmap
Vapor chamber emissivity tuning, EV battery-to-cabin integration and data-centre working-fluid loops show lighter filing density than the core battery and circuit-board classes. That is where a well-drafted first claim has more room to stand.
Run a white space search in EurekaCommon questions about the thermal management patent landscape
The ranked leader in this dataset holds 935 records, with the fifth-place filer at 585 and the tenth at 475, spanning electronics, semiconductor and automotive companies rather than a single sector. The top 5 combined account for only 5.5% of all 69,361 records in scope, and the top 10 for 9.2%, so no single company dominates the field. This is a landscape with a genuine leader but a long tail of active filers behind it, which matters for freedom-to-operate work because relevant prior art is unlikely to sit with just one or two assignees.
On complete-year data, filings grew from 1,275 in 2021 to 1,341 in 2024, a 5% increase, after peaking at 1,637 in 2022. The lower counts shown for 2025 and 2026 reflect publication lag, since patent applications typically publish around 18 months after filing, rather than a genuine drop in inventive activity. Treat the trend as a plateau after a 2022 peak, not a decline, until later years finish publishing.
Batteries and cells (IPC class H01M) is the largest single class at 3.7% of the 69,361 records, closely followed by printed circuits and assemblies (H05K) at 3.2%. Digital data processing, semiconductor devices, heat-exchange apparatus and vehicle heating and air-conditioning classes each carry meaningful shares as well, none exceeding 4% of records. Because a single patent can carry multiple IPC classes, these shares add up to more than 100%, and the spread confirms thermal management patenting is driven by several adjacent industries rather than one core technology.
Sub-areas with comparatively light filing density relative to the core classes include non-uniform emissivity surface treatments for heat dissipation, EV battery-to-cabin thermal integration, and working-fluid cooling loops for data-centre applications. These sit adjacent to dense classes like H01M and H05K but are not yet saturated with claims. A first claim in these areas has more room to establish distinct scope than one filed directly against the core battery or circuit-board classes.
Several historically active assignees, including large electronics and automotive filers, show year-over-year filing drops of roughly 83% to 94% in the latest tracked year. Part of this is a publication-lag artefact: patent applications filed in 2025 and 2026 have not all published yet, so recent-year counts for every assignee are understated. The consistent direction of the drop across multiple unrelated filers, however, suggests a real cooling in filing pace on top of the lag effect, worth confirming against each company's own filing calendar before drawing conclusions.
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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.