Wireless Power Transfer Patents: Top Companies & Filing Trends 2026
- Filing has cooled since its 2021 peak. 447 families published that year against 45 so far in the most recent (partial) year, with the 2022 midpoint of 395 already below peak.
- H02J dominates the IPC mix by a wide margin. 4,232 of 4,403 records touch power-supply and grid-system claims, dwarfing coil/transformer (H01F, 1,302) and EV propulsion (B60L, 784).
- Momentum has swung away from the incumbent names. Every tracked assignee shows flat or double-digit negative year-on-year momentum, including one filer down 98% and another down to zero filings.
Filing growth compares 2021 (447 records) with 2024 (264) — 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 4,403 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
This landscape draws on 4,403 patent families published between 2015 and mid-2026 that combine wireless, inductive or resonant power transfer terminology with claim language on coupling coefficient, coil design, foreign object detection, transfer efficiency or alignment tolerance, filtered to IPC classes H02J50, H01F38 and H02M3. That combination of keyword and classification search is designed to isolate the engineering core of wireless charging — power delivery, magnetics and conversion — rather than every device that happens to mention wireless charging in passing.
Filing activity is concentrated in the United States, European and PCT offices, with meaningful volume also filed in India, Canada and China. Because publication typically lags filing by around 18 months, the most recent year in any trend line understates real filing activity and should be read as a floor, not a ceiling.
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Filing trends and technology composition
The volume and classification data below chart where wireless power transfer claims have concentrated since 2017, and which adjacent technology areas overlap most heavily with the core coil and power-conversion filings.
A post-2021 slowdown, not a collapse
Filings rose from 287 in 2017 to a peak of 447 in 2021, then eased to 395 by 2022 and continued down toward 45 in the current partial year. That pattern reads as a maturing claim space rather than an abandoned one: the foundational coil-design and efficiency claims were staked out early, and later filers are working narrower, more defensive ground.
Power systems, not antennas, carry the claim density
H02J (power supply and grid systems) appears in 4,232 of 4,403 records, effectively defining the corpus. H01F (magnetics and transformers) and H04B (transmission) form a secondary tier, while B60L (EV propulsion) at 784 records confirms the automotive charging use case is a major but not dominant driver. Antenna-specific claims under H01Q sit at just 134, suggesting most wireless power work is decoupled from RF antenna design.
Shares are the percentage of the 4,403 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Wireless Power Transfer Systems with Eureka
This page is one run against one query. Ask Eureka your own question about wireless power transfer systems and every answer comes back with the patent numbers behind it.
Try EurekaMost-cited and most recent filings
Foreign object detection reaches a probabilistic claim architecture
US20260177406A1, filed by Witricity AI Tech, describes generating separate probability distribution functions for a foreign-object-detection sensitivity threshold and for measured detection values on an object, then combining them into a third distribution representing the probability of a missed detection. That statistical framing of FOD accuracy, rather than a fixed-threshold trigger, is the claim's technical core.Filed 2026-06-25; abstract condensed from the original filing.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20110254377A1 | Wireless power transmission in electric vehicles | 695 |
| 2 | US6960968B2 | Planar resonator for wireless power transfer | 658 |
| 3 | US20100259110A1 | Resonator optimizations for wireless energy transfer | 563 |
| 4 | US20120098350A1 | Wireless energy transfer for photovoltaic panels | 561 |
| 5 | US8937408B2 | Wireless energy transfer for medical applications | 543 |
| 6 | US20120313449A1 | Resonator optimizations for wireless energy transfer | 515 |
| 7 | US20130033118A1 | Tunable wireless power architectures | 485 |
| 8 | US20040000974A1 | Planar resonator for wireless power transfer | 457 |
| 9 | US8106539B2 | Wireless energy transfer for refrigerator application | 406 |
| 10 | US20100045114A1 | Adaptive wireless power transfer apparatus and method thereof | 398 |
Citation counts reward older filings simply because they have had more time to accumulate citations within the searched corpus; treat this table as a map of technical influence, not a ranking of current market relevance.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Three patterns stand out once the filing trend, IPC composition and citation data are read together: the technology has passed its filing peak, the claim space is anchored in power delivery rather than RF, and influence is still held by early foundational patents.
Volume has receded from its 2021 high
Filings climbed steadily from 287 in 2017 to 447 in 2021, then declined through the 2022 midpoint of 395 down to 45 in the current partial year. Given the typical 18-month publication lag, the true recent-year total will land higher than 45, but the downward trend from 2021 through 2022 is already visible without that adjustment.
Power-supply claims define the corpus almost entirely
H02J appears in the overwhelming majority of records, with H01F magnetics and H04B transmission forming secondary clusters. The comparatively small H01Q antenna count (134) indicates that most wireless power claims are built around power-electronics and coil engineering rather than RF antenna theory.
Foundational resonator and coupling patents still anchor the field
The most-cited records date to the early wireless power era and cover core resonator and coupling concepts applied to vehicles, photovoltaics and medical devices. Their citation counts reflect years of accumulation rather than current filing activity, but they remain the technical reference points that later claims are drafted around.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to wireless power transfer systems, with the prior art for and against each one.
Assignee activity and collaboration
No single assignee is scaling filings in the most recent year; the leaderboard is defined more by who is slowing down less than by who is growing. A small number of co-filing pairs point to structured joint development rather than incidental overlap.
Every tracked filer is contracting
Recent-year momentum data shows declines across the board, from a 67% year-on-year drop at Royal Philips to a full stop at Witricity, which recorded zero filings in the latest year against its prior volume. Even the most stable filer, Qualcomm, held flat at a single filing rather than growing.
Automotive OEM-university pairings are the densest collaboration
Hyundai Motor and Kia Motors co-assign 77 families, by far the strongest pair in the dataset, with each also separately paired with Sungkyunkwan University's industry-academic cooperation foundation at 25 families apiece. That triangle suggests a structured EV-charging research programme rather than opportunistic co-filing.
Filing is concentrated in the US, EPO and PCT route
The United States receives roughly half of all filings, with Europe and the WIPO PCT route forming the next tier. India's 297 filings outweigh both Canada and China, indicating meaningful examination activity outside the traditional US-Europe-Japan-China axis.
| Assignee | Recent year | YoY |
|---|---|---|
| Royal Philips | 4 | -67% |
| NuCurrent | 1 | -95% |
| Qualcomm Incorporated | 1 | 0% |
| Apple Inc. | 1 | -98% |
| LG Electronics | 1 | -67% |
| Witricity | 0 | -100% |
| Solace Power | 0 | -100% |
| Auckland UniServices Limited | 0 | -100% |
Where to take this analysis
The trend and assignee data point to a field past its filing peak but still contested at the margins, particularly around foreign object detection and alignment tolerance claims.
Screen the under-claimed branches before filing
Dynamic alignment sensing and multi-coil FOD discrimination show thinner claim density than the core power-supply cluster, making them worth an early freedom-to-operate pass.
Run a white space search in EurekaTrack the FOD probabilistic-detection claim family
US20260177406A1's statistical approach to missed-detection probability is a recent filing worth monitoring for continuations and oppositions.
Monitor this filing in EurekaWatch for consolidation among slowing filers
With every tracked assignee showing flat or negative momentum, acquisitions or licensing deals are a plausible next move for smaller portfolio holders.
Set up assignee alerts in EurekaCommon questions on wireless power transfer patents
The dataset tracks assignees including Royal Philips, Qualcomm, Apple, LG Electronics and Witricity, alongside automotive players Hyundai and Kia, which co-file heavily with Sungkyunkwan University's technology transfer arm. No single company is currently scaling volume; recent-year momentum is flat or negative across every tracked filer, so leadership in this space is better read from cumulative family counts and citation influence than from recent filing speed. Anyone doing diligence should pull the full assignee ranking rather than rely on a single year's activity.
No. Filings rose from 287 in 2017 to a peak of 447 in 2021, then declined to 395 by 2022 and continued down toward 45 in the current partial year. Some of that recent drop reflects the normal 18-month lag between filing and publication rather than an actual stop in R&D, but the decline from the 2021 peak through 2022 predates that lag effect and looks like a genuine slowdown in new claim activity. This pattern is more consistent with a maturing, already-claimed technology than a shrinking market.
The core classification is H02J50, covering wireless power supply systems, supplemented by H01F38 for the magnetics and coil hardware and H02M3 for the power conversion circuitry that manages charging. In this dataset, H02J appears in 4,232 of 4,403 records, making it the defining classification, while H01F (1,302), H04B (812) and B60L (784, electric vehicle propulsion) form the next tier. Antenna-specific classification H01Q is comparatively rare at 134 records, indicating most claims sit in power electronics rather than RF design.
Foreign object detection (FOD) claims in this corpus generally cover methods for distinguishing a chargeable device from a metallic or biological foreign object sitting in or near the charging field, often using changes in coupling coefficient, impedance or thermal signature as the detection trigger. The representative recent filing, US20260177406A1, moves beyond a fixed detection threshold to a probabilistic framework, generating separate probability distributions for sensitivity thresholds and measured object values and combining them into a missed-detection probability. Drafting around this style of claim means either using a genuinely different detection modality or avoiding the specific probabilistic-combination step it describes.
Electric vehicle charging is a clear driver, evidenced by 784 records under B60L (EV propulsion) and heavy co-filing between automotive OEMs like Hyundai and Kia and their university research partners. Consumer electronics and mobile device charging also feature prominently among the tracked assignees, alongside a smaller but persistent cluster of medical-device applications visible in the most-cited historical records. The geographic filing pattern, with the US, EPO and PCT route accounting for the bulk of filings and India also showing substantial volume, points to both device manufacturers and component suppliers pursuing broad multi-jurisdiction protection.
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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.