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Run your analysis now →https://www.patsnap.com/resources/blog/rd-blog/magnetic-resonance-and-mid-range-power-transfer-patent-landscape/ · Patsnap · data cut-off 2026-07-31 · downloaded from the live page
Patent Landscape · Wireless Power TransferMagnetic Resonance and Mid-Range Power Transfer Patents
- 70.3% concentration. The top 5 of 39 ranked assignees together hold 26 of the 37 records in scope — a field with a small controlling group and a long single-filing tail.
- Filing peaked in 2022 at 11 records, then fell toward zero by 2024; because publication lags filing by about 18 months, 2025-26 figures are still filling in and should not be read as a fresh decline.
- Impedance matching claims dominate the cited core, with the most-cited record in the set — WO2019148070A2 — appearing again as the basis for a later US filing and an EP grant to the same applicant family.
37
Published Records
70%
Top-5 Share of All Records
-100%
Filing Growth 2021→2024
IN
Leading Jurisdiction
Filing growth compares 2021 (1 records) with 2024 (0) — 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 37 records in scope (CR5), not by the ranked leaders only.
Published byPatsnap Research··6 min readSourced from Patsnap Eureka
Overview
What this landscape covers
This review covers 37 published records at the intersection of resonant inductive coupling and mid-range wireless power transfer, searched against claim and description language covering resonator quality factor, frequency splitting, impedance matching, transfer distance, multi-receiver operation and offset efficiency. The scope spans 2015 through the 2026-07-31 data cut-off, and treats each publication as a data point rather than assuming family consolidation across jurisdictions.
The dataset is small enough that a handful of applicants and a single influential filing family shape most of what is visible. That makes concentration figures and citation counts more informative here than in a larger corpus, but it also means white space claims should be read as under-filed rather than proven-open — a smaller field leaves more territory simply untested.
Filing activity and technology composition, 2015-2026
Source: Patsnap Eureka. Assignee ranking and totals. Derived from a Patsnap search on Magnetic Resonance and Mid-Range Power Transfer covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
The Data
Filing trend and technology composition
Two views of the same 37 records: how filing activity moved year over year, and which IPC subclasses the claims actually sit in.
Filing trend, 2017-2026
Filings rose from 0 in 2017 to a peak of 11 in 2022, then declined toward the -100% mark recorded between 2021 and 2024. Treat 2025 and 2026 as incomplete rather than as evidence the field has gone quiet.
IPC subclass composition
H02J (power supply and grid systems) covers 91.9% of the 37 records, confirming this is fundamentally a power-delivery-system field rather than a materials or antenna-design one. H01F and H02G each sit at 29.7%, and B60L (electric vehicle propulsion) reaches 16.2%, showing a secondary automotive-charging cluster. Because records can carry multiple classes, these shares sum to well over 100%.
Shares are the percentage of the 37 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Source: Patsnap Eureka. Filing trend and technology composition. Derived from a Patsnap search on Magnetic Resonance and Mid-Range Power Transfer covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.
Go deeper on Magnetic Resonance and Mid-Range Power Transfer with Eureka
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Most-cited records in the corpus
Representative filing
EP3743981B1 — wireless power transfer with integrated impedance matching
INDIGO TECHNOLOGIES, INC.
Granted to Indigo Technologies on 2024-05-29, this European filing sits in the same family as the most-cited record in the set, WO2019148070A2, and covers integrated impedance matching methods for wireless power transfer systems.Family member of the corpus's top-cited application; granted claim scope is narrower than the original PCT filing.
Citation leaders
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | WO2019148070A2 | Wireless power transfer systems with integrated impedance matching and methods for using the same | 55 |
| 2 | US20210044150A1 | Wireless power transfer systems with integrated impedance matching and methods for using the same | 13 |
| 3 | US9755456B1 | Control circuit for wireless power | 10 |
| 4 | CN111654119A | 无线充电系统的阻抗匹配装置及无线充电系统 | 6 |
| 5 | US11418062B2 | Wireless power transfer systems having concentric coils | 5 |
| 6 | CA3089620A1 | Wireless power transfer systems with integrated impedance matching and methods for using the same | 4 |
| 7 | CN111869046A | 具有集成阻抗匹配的无线电力传送系统及其使用方法 | 1 |
Citation counts inside a searched corpus favour older filings; read them as a signal of influence on subsequent drafting, not as a measure of current commercial weight.
Patent titles are shown in the language they were filed in, not translated, so that each record stays verifiable against the original filing — a translated title will not match in Eureka or in any national register. Publication numbers are shown where the record carries one (7 of 7 rows); clicking a row searches Eureka by that number.
Source: Patsnap Eureka. Citation counts and representative records. Derived from a Patsnap search on Magnetic Resonance and Mid-Range Power Transfer covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
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What the numbers mean for filing strategy
Three figures worth acting on before drafting into this space.
Concentration
70.3%
of 37 records held by top 5 of 39 assignees
A small group controls most of the filed art
26 of the 37 records in scope belong to the five leading assignees, with the leader alone holding 11. A new entrant is not filing into open ground at the core claim language — it is filing adjacent to a small number of applicants who already hold dense positions in impedance matching and integrated transfer systems.
Top 5 of 39 ranked assignees, 26/37 records
Filing trend
11 in 2022
peak year, then -100% to 2024
Read the recent years as incomplete, not declining
The peak year on record is 2022 with 11 filings; the drop to 2021→2024's -100% span is real for that window, but publication lag of roughly 18 months means 2025 and 2026 figures will keep rising as more records surface. Do not treat the current tail as the field cooling off.
2021=1 to 2024=0, -100% over three years
Claim geography
H02J 91.9%
of 37 records touch power-supply-system claims
Claims cluster in power-delivery systems, not components
Almost every record in this set touches H02J power-supply-and-grid claim language, while H01F (magnetics/transformers) and H02G (cable installation) sit far lower at 29.7% each. Drafting purely around a coil or transformer improvement without a systems-level claim risks sitting outside where the dense prior art actually is.
H02J 34/37, H01F 11/37, H02G 11/37 records
Eureka AI Agent
Looking for what nobody has claimed yet?
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to magnetic resonance and mid-range power transfer, with the prior art for and against each one.
Source: Patsnap Eureka. Co-assignee relationships and derived observations. Derived from a Patsnap search on Magnetic Resonance and Mid-Range Power Transfer covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
Players
Who is filing, and where the gaps sit
The ranking covers all 39 assignees the data endpoint returns for this scope — not a top-50 or top-100 cut.
Leader
11 records
held by the top-ranked assignee
One applicant sets the pace
The leading assignee's 11 records make it the single largest holder in a 37-record field, roughly a third of everything published in scope. Its filings anchor the impedance-matching citation cluster that the rest of the landscape references.
11 of 37 records
Long tail
39 ranked assignees
for 37 total records
Most applicants filed once
With more assignees than records, the bulk of the ranking is single-filing academic and small-applicant entrants — university departments and individual inventors rather than repeat corporate filers. That pattern is typical of an early-stage or narrowly-scoped field.
39 assignees across 37 records
Co-filing
10 pairs
of co-assignee collaborations recorded
Collaboration is limited and mostly bilateral
Ten co-assignee pairs appear in the set, the strongest linking two entities from the same corporate group and two academic co-inventors. There is no sign of a broad multi-party consortium filing pattern here.
10 co-assignee pairs, strongest pair at 2 records
Recent-year filing momentum
| Assignee | Recent year | YoY |
|---|---|---|
| Indigo Technologies, Inc. | 0 | — |
| SENSONIC DESIGN ZRT | 0 | — |
| TANG SAI CHUN | 0 | — |
| ADITYA UNIV | 0 | -100% |
| Valeo Electrification | 0 | — |
| Wuxi Vocational College of Science and Technology | 0 | — |
| VIJAYAKUMAR M | 0 | -100% |
| SWARNANDHRA COLLEGE OF ENG & TECH AUTONOMOUS | 0 | -100% |
Source: Patsnap Eureka. Assignee-level momentum. Derived from a Patsnap search on Magnetic Resonance and Mid-Range Power Transfer covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
What's Next
Where to take this analysis
The dataset points to a concentrated core and a thin periphery; the next steps depend on which side of that line you are working from.
Map the impedance-matching family in full
WO2019148070A2 and its US and EP family members anchor the citation graph in this set. Before drafting near integrated impedance matching, trace the full prosecution history of that family to see what was granted versus what was narrowed.
Explore this family in EurekaTest the under-claimed branches for real freedom to operate
G05B control-loop and G06N AI-assisted tuning claims each appear in only one record out of 37. That could mean genuine white space or simply that filings exist outside this search string's scope — worth a targeted follow-up search.
Run a targeted search in EurekaSource: Patsnap Eureka. Forward-looking reading of the same dataset. Derived from a Patsnap search on Magnetic Resonance and Mid-Range Power Transfer covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
FAQ
Common questions on this landscape
In this 37-record dataset, one assignee leads with 11 records, and the top 5 of 39 ranked assignees together hold 26 records, or 70.3% of everything in scope. That means a small group of applicants controls most of the filed claim language, particularly around impedance matching and integrated transfer systems. Anyone filing new claims in this space should expect to draft around, or license from, that leading cluster rather than assuming open ground.
Filing peaked at 11 records in 2022 and then fell sharply, with a recorded -100% change between 2021 and 2024. However, publication typically lags filing by around 18 months, so the 2025 and 2026 figures in any dataset are still incomplete at the time of search. The honest reading is that the field cooled after 2022 by the numbers we can currently see, not that it has stopped — later years will fill in as more records publish.
Almost all records, 91.9% of the 37 in scope, touch H02J power-supply-and-grid-system claims, making this primarily a systems-level field rather than a materials or coil-design one. H01F (magnetics and transformers) and H02G (cable installation) each cover 29.7% of records, and B60L (electric vehicle propulsion) reaches 16.2%, pointing to a secondary automotive-charging use case. Because a single record can carry several IPC classes, these percentages overlap rather than sum to 100%.
EP3743981B1, granted to Indigo Technologies on 2024-05-29, covers integrated impedance matching methods for wireless power transfer systems and sits in the same family as WO2019148070A2, the most-cited record in this dataset at 55 citations. Anyone building a resonant wireless power system with in-line impedance matching circuitry should review the granted claim scope of this specific European filing rather than assuming the broader PCT application's language carries over unchanged. Granted claims are typically narrower than the original filing, so the exact wording matters more than the family's reputation.
The thinnest IPC branches in this dataset are G05B control-and-regulation systems and G06N AI-based computing, each appearing in only a single one of the 37 records, alongside H02M power conversion at the same single-record level. These could represent genuine under-filed territory around control-loop tuning or AI-assisted offset efficiency, or simply reflect the boundaries of this particular search string. Either way, a follow-up search with broader terms is worth running before treating any of these as confirmed open ground.
Answers are grounded in the same dataset. Derived from a Patsnap search on Magnetic Resonance and Mid-Range Power Transfer covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
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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.