SiC Wireless Power Transfer Patent Snapshot 2026
The SiC wireless power transfer patent corpus is small and highly concentrated, with a handful of filers — led by Nordson Corporation — holding a disproportionate share of activity, and China dominating as the primary filing jurisdiction. Annual volume peaked in 2019 and has since eased, indicating a field that has not yet reached broad commercial momentum.
Nordson leads a tightly held, nascent corpus
The SiC wireless power transfer evidence snapshot is comprised of 7 patent families in scope. Nordson Corporation holds the top position among all ranked filers, followed by the Army Engineering University of PLA with the second-highest count.
The top five filers collectively account for 53% of the combined total across the ranked applicants visible in this query, signalling strong concentration at the top despite the corpus’s small absolute size. The gap between the leader and all other applicants is notable, with most filers holding a single patent record each.
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 1 | Nordson Corporation | 3 | |
| 2 | Army Engineering University of PLA | 2 | |
| 3 | Xiao Li | 1 | |
| 4 | Global Power Technology Co. Ltd. | 1 | |
| 5 | State Grid Jiangsu Electric Power Co. Ltd. Research Institute | 1 | |
| 6 | JIS College of Engineering | 1 |
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 7 | State Grid Corporation of China | 1 | |
| 8 | Southeast University | 1 | |
| 9 | Electric Power Research Institute of Guangxi Power Grid Co. Ltd. | 1 | |
| 10 | Elox Corporation of Michigan | 1 | |
| 11 | Institute of Electrical Engineering, Chinese Academy of Sciences | 1 | |
| 12 | Jiangsu Electric Power Research Institute | 1 |
Nordson’s lead position, built on spraying, coating, and insulator-related patents, suggests the company is approaching SiC wireless power transfer from a materials-processing angle rather than pure power-electronics design — a differentiated entry point relative to the Chinese power-grid and university filers.
The most recent filing periods are subject to publication lag and likely under-represent current activity; conclusions about very recent trends should be treated with caution. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
A 2019 peak followed by low, intermittent activity
Filing activity spiked in 2019 then fell sharply, with only isolated records appearing in subsequent years. The technology composition is dominated by power supply and power conversion classes, with a secondary cluster in surface-treatment and insulator codes that reflects Nordson’s filing strategy.
Annual filing trend
Activity peaked in 2019 and has been sparse since. Single records appear in 2021, 2022, 2025, and 2026, but the 2025–2026 figures are subject to publication lag and should not yet be read as a recovery signal.
↗ Hover for values · click a bar to ask EurekaTechnology composition
H02J (power supply and grid systems) and H02M (power conversion) are the visible IPC branches, reflecting the core wireless power transfer function. B05B, B05D, and H01B appear due to Nordson’s coating and insulator-focused patents, while B60L (electric vehicle propulsion), H01F (magnets, inductors, and transformers), and B23H (electro/chemical machining) each represent only a single patent record.
↗ 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.
Improvements in and relating to electrical dischar…
1,033,017. Electro erosion. ELOX CORPORATION OF MICHIGAN. Feb. 26, 1963 [Nov. 1, 1962], No. 7640/63. Heading B3V. [Also in Division H3] An electro-erosion apparatus comprises an energy storage means 12 charged from a direct current source 10 through switch 22 and discharged through switch 24, and including means whereby during both charging and discharging… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | 一种用于移动终端的智能无线充电装置及其控制方法 | 9 |
| 2 | Electrostatic spray coating system | 4 |
| 3 | 一种用于移动终端的智能无线充电装置 | 2 |
| 4 | 高效率高频逆变电路 | 2 |
| 5 | 一种无线充电系统的驱动电路构建方法及系统 | 1 |
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.
Nordson Corporation
Nordson Corporation holds 3 patent records, the highest count in the corpus. Its filings concentrate on B05B (spraying and atomising), B05D (coating processes), and H01B (cables, conductors, and insulators) — suggesting an approach centred on SiC surface treatment and insulation materials rather than circuit-level wireless power transfer. No recent momentum trend is available in the evidence for Nordson, so trajectory is evidence pending.
patent records: 3Army Engineering University of PLA
The Army Engineering University of PLA holds 2 patent records, focused entirely on H02J 50 (wireless power supply systems), placing it as the closest filer to the core WPT power-electronics problem. No applicant momentum trend is available for this entity in the evidence. Its affiliation with the Chinese military suggests a defence-driven research mandate rather than commercial product development.
patent records: 2Frequently asked questions
The evidence identifies 7 patent families in scope for this topic globally.
Nordson Corporation leads with 3 patent records, followed by the Army Engineering University of PLA with 2 patent records. All other ranked filers hold a single patent record each.
China is the visible filing jurisdiction, accounting for 6 of the patent records in the corpus. The European Patent Office, the United Kingdom, and India each account for a smaller number of records.
The field is classified as Decline, with annual filings having eased back from the 2019 peak. The overall corpus remains very small, indicating limited broad commercial investment to date.
Yes. A Chinese grid-utility and university group — comprising Jiangsu Electric Power Research Institute, State Grid Jiangsu Electric Power Co. Research Institute, State Grid Corporation of China, and Southeast University — forms the primary co-filing cluster. A separate collaboration links Xiao Li and Global Power Technology Co. Ltd.
B60L (electric vehicle propulsion), H01F (magnets, inductors, and transformers), and B23H (electro/chemical machining) each carry only one patent record and represent a 4% share each. B60L and H01F have the clearest technical connection to SiC wireless power transfer and the lowest prior-art density within this corpus.
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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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