Wireless Power Transfer Patents: Top Companies & Filing Trends 2026
- 23.6% sits with five companies. The top five assignees account for 3,032 of 12,874 records in scope, with a long tail of single- and few-filing entrants behind them.
- Filings peaked in 2021 at 1,220. Volume has since eased to 730 in 2024, a 40% decline over that three-year span — the clearest complete-year signal the data supports.
- Power supply claims dominate, at 58.3%. H02J covers 7,501 of the 12,874 records, far ahead of transmission (H04B, 21.6%) and magnetics (H01F, 11.1%).
Filing growth compares 2021 (1,220 records) with 2024 (730) — 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 12,874 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
This dataset spans 12,874 published records matching wireless, inductive and contactless power transfer claims combined with radio-channel, frequency-band, switching-frequency or power-stage terminology, filed between 2015 and the 2026 data cut-off. It captures the overlap between power electronics and wireless signalling that defines modern charging systems — from handset pads to vehicle charging pads to implantable and surgical devices. Because publication lags filing by roughly 18 months, the most recent one to two years in any trend chart will always look thinner than they eventually turn out to be.
The picture that emerges is a field with real concentration at the top — five companies hold close to a quarter of all records — but with most of the remaining claim space spread across a long tail of filers, each with a handful of families. Reading the assignee ranking, the IPC composition and the filing trend together is the fastest way to see which sub-areas are already crowded and which are still open for a first-mover claim.
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Filing trends and technology composition
Three views of the same 12,874-record dataset: how filing volume has moved year over year, and how those records split across the IPC subclasses that define the technology.
Filing trend, 2017–2026
Filings ran from 1,142 in 2017 to a peak of 1,220 in 2021, then eased to 730 by 2024 — a 40% decline over that three-year window. 2025 and 2026 figures (96 in the most recent year) are still filling in under the usual 18-month publication lag and should not be read as a continuing drop.
Technology composition by IPC subclass
H02J (power supply and grid systems) anchors the field at 58.3% of the 12,874 records, with H04B transmission claims at 21.6% and magnetics/inductor claims (H01F) at 11.1%. Vehicle-specific claims (B60L, 8.1%) and medical-device claims (A61B, 6.2%) mark the two clearest application verticals layered on top of the core power-transfer art. Records commonly carry more than one class, so these shares sum past 100%.
Shares are the percentage of the 12,874 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 Patent Landscape with Eureka
This page is one run against one query. Ask Eureka your own question about wireless power transfer patent landscape and every answer comes back with the patent numbers behind it.
Try EurekaRepresentative filing and most-cited prior art
System and method for protecting a wireless power transfer system
A wireless power transfer system is disclosed. The wireless power transfer system includes a first converting unit configured to convert a first DC voltage of an input power to a first AC voltage. Further, the wireless power transfer system includes a contactless power transfer unit configured to receive the input power having the first AC voltage from the first converting unit and transmit the input power. Also, the wireless power transfer system includes a second converting unit configured to receive the input power from the contactless power transfer unit and convert the first AC voltage of the input power to a second DC voltage.Filed by Bunker Hill Technologies, LLC, published 2020-09-10. Structured around a DC-to-AC-to-DC conversion path either side of a contactless transfer stage, with an explicit protection function layered on top.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20080300572A1 | Wireless monitor for a personal medical device system | 1,275 |
| 2 | US20120235636A1 | Systems and methods for providing positioning freedom, and support of different voltages, protocols, and powe… | 1,197 |
| 3 | US20050192727A1 | Sensor Assemblies | 1,180 |
| 4 | US7103460B1 | System and method for vehicle diagnostics | 1,177 |
| 5 | US20060025897A1 | Sensor assemblies | 1,057 |
| 6 | US20090243397A1 | Packaging and Details of a Wireless Power device | 1,024 |
| 7 | US20100327766A1 | Wireless emergency lighting system | 996 |
| 8 | US20110133655A1 | Autonomous grid shifting lighting device | 934 |
| 9 | US6988026B2 | Wireless and powerless sensor and interrogator | 773 |
| 10 | US20220066456A1 | Obstacle recognition method for autonomous robots | 763 |
Citation counts favour older filings that have had more time to accumulate citations within this corpus; treat them as a signal of influence on the field rather than 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 filing strategy
Reading concentration, technology mix and citation patterns together points to where claim space is already occupied and where a new filing has room to stand.
The top of the field is dense, the rest is a long tail
Five assignees hold 3,032 of the 12,874 records in scope, and the top ten extend that to 32.5%. Beyond the leaders, the ranked list of 100 companies thins out quickly — most named entities carry only a handful of families, which is where freedom-to-operate work should focus first.
Volume has cooled from its 2021 peak, but recent years understate it
The complete-year trend shows a real decline from the 2021 peak to 2024. 2025 and 2026 figures are still incomplete under the normal publication lag, so treat any apparent further drop with caution until those years mature.
Power-stage claims dominate; wireless-network claims are a smaller layer
H02J power supply and grid claims appear in the majority of records, while H04W wireless network claims sit at 8.8% — a much thinner layer than the transmission-general class (H04B, 21.6%). That gap suggests the network-integration side of wireless power is less thoroughly claimed than the core power-conversion side.
Co-filing is rare and narrowly clustered
Only 10 co-assignee pairs appear in the dataset, and the strongest pairing recurs at 123 shared records — a small, tight cluster rather than a broad collaborative network across the field.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to wireless power transfer patent landscape, with the prior art for and against each one.
Who holds the claim space, and where momentum is shifting
The leader board is concentrated among consumer-electronics and semiconductor names, but recent-year momentum has slowed even at the top — a signal that the easiest core claims have largely been staked.
One company sits well clear of the field
The leading assignee's 1,041 records dwarf the fifth-place total of 371, showing a steep drop-off rather than an even spread among the top names. That gap matters for competitive tracking: the leader's filing choices set the pace the rest of the field reacts to.
A steep drop from fifth to tenth place
Filing counts fall from 371 at fifth place to 139 at tenth, confirming that concentration is front-loaded into a handful of names rather than spread evenly across the top ten.
Even active filers have pulled back sharply in the latest year
Recent-year filing counts among named leaders are low in absolute terms and down sharply year-on-year across the board. Given the 18-month publication lag, part of this is an artefact of incomplete recent data rather than a genuine full stop in filing activity.
| Assignee | Recent year | YoY |
|---|---|---|
| LG Electronics | 8 | -82% |
| Qualcomm Inc. | 6 | -73% |
| Canon Inc. | 4 | -73% |
| Koninklijke Philips N.V. | 3 | -40% |
| NuCurrent Inc. | 2 | -95% |
| Apple Inc. | 2 | -93% |
| Samsung Electronics Co., Ltd. | 2 | -71% |
| WANG BEIBEI | 1 | -75% |
Where to take this analysis
The dataset points to specific next steps depending on whether the goal is freedom-to-operate, white-space filing, or competitive tracking.
Check freedom-to-operate against the top ten
With 32.5% of all records held by ten assignees, a targeted clearance search against those names, rather than the full 100-company ranking, covers most of the concentrated risk efficiently.
Run a clearance search in Eureka →Scope a filing in the under-claimed branches
Network-integrated power control and surgical receiver coil design carry noticeably lower class coverage than the core H02J and H04B claims, making them candidates for a first, defensible claim.
Explore white space in Eureka →Track momentum, not just headcount
Recent-year filing drops among leading assignees may reflect publication lag as much as a real slowdown; revisit this trend once 2025–2026 data matures before drawing conclusions.
Set up monitoring in Eureka →Common questions about the wireless power transfer patent landscape
The assignee ranking is led by a single company with 1,041 records, well ahead of the fifth-place holder at 371. The top five assignees combined account for 23.6% of the 12,874 records in scope, and the top ten reach 32.5%. Beyond the top ten, coverage thins quickly into a long tail of companies with a small number of filings each, so most of the field's activity is not held by a handful of names but spread across many smaller filers.
Filing volume peaked in 2021 at 1,220 records and had fallen to 730 by 2024, a 40% decline over that three-year span using the last fully mature filing years available. Because publication typically lags filing by around 18 months, the lower counts shown for 2025 and 2026 are incomplete rather than evidence of a further collapse. Anyone assessing momentum should anchor on the 2021–2024 comparison rather than the most recent one or two years.
Power supply and grid systems (IPC class H02J) appear in 58.3% of the 12,874 records, making it by far the largest single class in the dataset. Transmission-general claims (H04B) follow at 21.6%, with magnetics and inductor claims (H01F) at 11.1%. Electric vehicle propulsion (B60L, 8.1%) and medical diagnosis and surgery (A61B, 6.2%) mark the field's two clearest downstream applications, layered on top of the core conversion and transmission art.
Relative to the dominant H02J and H04B classes, wireless network integration (H04W, 8.8%) and power conversion hardware (H02M, 8.2%) carry noticeably thinner coverage, suggesting the integration layer between wireless power and network control is less thoroughly claimed than the core power-stage art. Sub-areas such as multi-protocol switching-frequency negotiation and surgical or implantable receiver coil design also show comparatively light coverage. These are reasonable starting points for scoping a first claim, though any filing decision should be checked against a full freedom-to-operate search.
Moderately concentrated at the very top, but not overall. The leading five assignees hold 23.6% of the 12,874 records, and the ranked list extends to 100 companies with a steep drop-off after the top ten. That leaves close to two-thirds of the field distributed among a long tail of filers, which is typical of a technology area with multiple downstream applications — consumer electronics, EV charging, and medical devices each pull in different filers.
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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.