High Frequency Converter Patents: Leaders & Filing Trends 2026
A data-backed view of high frequency converter patents in wide-bandgap power electronics: filing trends since 2015, the concentration of activity among leading assignees, the IPC classes carrying the most claim density,
Filing growth = 2021 (526 records) → 2024 (287); 2024 is the last year we treat as complete. Top-5 share = the 5 largest assignees ÷ all 26,050 records in scope (CR5), not the ranked leaders only.
What this landscape covers
High frequency converter design sits at the intersection of power conversion, switching-device control and signal transmission. The scope here spans 26,050 published records filed or published between 2015 and 2026, captured through claim and title language around high-frequency conversion circuits. The dataset is not limited to a single application: power supply topologies, RF/communications hardware, and even electrosurgical instruments that rely on high-frequency converter stages all fall inside the search string, which is why the most-cited records include medical devices alongside classic power-conversion filings.
Because publication trails filing by roughly 18 months, the most recent one or two years in any trend understate true activity — 2026's low count is an artefact of the data cut-off, not a real collapse in filing. The safer read is the 2021-to-2024 window, where the trend is unambiguous: filing volume fell from 526 to 287 records, a decline that predates any recency lag.
Filing trend and technology composition
Two views of the same 26,050-record dataset: how filing volume has moved year over year, and which IPC subclasses carry the claim density that shapes where new filings can land.
A 2017 peak followed by a real 2021–2024 decline
Filings peaked at 557 in 2017. By 2021 the annual count had already eased to 526, and it continued down to 287 in 2024 — a 45% fall over that three-year window. Years after 2024 are still filling in under the publication lag and should not be read as a further drop.
Publication lags filing by roughly 18 months, so 2025 onwards are still filling in. Growth rates on this page therefore end at 2024; running them to the last bar would understate the field.
Power conversion and transmission classes carry the density
H02M (power conversion) appears on 16.4% of the 26,050 records, the single densest class, followed by H04B (transmission, general) at 11.6%. Power supply and grid systems (H02J, 6.0%) and electric heating and lighting circuits (H05B, 5.7%) trail well behind, with measurement (G01R) and coding (H03M) classes each under 5%. Because records can carry multiple IPC codes, these shares are not mutually exclusive and do not sum to 100%.
Shares are the percentage of the 26,050 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Wide-Bandgap Power Electronics: High Frequency Converter Patent Landscape with Eureka
This page is one run against one query. Ask Eureka your own question about wide-bandgap power electronics: high frequency converter patent landscape and every answer comes back with the patent numbers behind it.
Try EurekaA representative early filing and the most-cited records
US5010261A — Lossless gate driver circuit for a high frequency converter
A high efficiency gate driver circuit for driving a power switching device of a high frequency converter includes a series resonant circuit for making resonant transfers of energy between the input capacitance of the power switching device and a storage capacitor to achieve substantially lossless gate switching. An ac switch couples the resonant circuit to the junction between upper and lower switching devices connected in a half-bridge configuration.Filed by North American Power Supplies in 1991, this record predates the dataset's main filing window but is still cited as foundational gate-driver prior art for half-bridge high-frequency converter topologies.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | EP1034747A1 | Electrosurgery system and instrument | 1,955 |
| 2 | EP1055400A1 | An electrosurgical instrument | 1,932 |
| 3 | US6409724B1 | Electrosurgical instrument | 1,610 |
| 4 | US20020072816A1 | Audio system | 978 |
| 5 | US5163421A | In vivo ultrasonic system with angioplasty and ultrasonic contrast imaging | 723 |
| 6 | US20190385057A1 | System and Method for using Signal Waveform Analysis for Detecting a Change in a Wired Network | 584 |
| 7 | US5642270A | Battery powered electric vehicle and electrical supply system | 502 |
| 8 | US5982645A | Power conversion and distribution system | 485 |
| 9 | US5185736A | Synchronous optical transmission system | 478 |
| 10 | US7193872B2 | Solar array inverter with maximum power tracking | 475 |
Citation counts favour older filings by construction — a high count signals influence within this corpus, not that the claim is still the state of the art. Two of the most-cited records here are electrosurgical instruments, not power supplies, reflecting how broadly the search string's claim language is used across industries.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Browse MCP servers →What the concentration and composition data imply
Read together, the ranking and the IPC breakdown point to a field that is technically crowded but not commercially cornered by a handful of players.
No single filer controls the field
The leader holds 745 records and the tenth-ranked assignee 295, but together the top 5 account for only 10.3% of all records in scope and the top 10 for 16.3%. That leaves the large majority of filings spread across a long tail of entrants — a structure that favours a new filer finding open claim space rather than facing one gatekeeper.
Real decline, not just recency lag
Volume dropped from 526 records in 2021 to 287 in 2024, a fall that sits entirely inside the window unaffected by publication lag. That is a genuine pullback in new filing activity following the 2017 peak of 557, not an artefact of recent data still filling in.
Power conversion claims are the densest single class
H02M appears on 16.4% of the 26,050 records, well ahead of the next most common class, H04B transmission at 11.6%. Heavy presence in a class signals occupied claim space, not that the underlying technology is settled — adjacent classes like H03M coding (3.4%) and G01R measurement (4.0%) carry far less density.
US filings dominate the receiving-office mix
The United States receiving office accounts for the largest share of filings at 8,941, well ahead of the EPO at 3,662 and WIPO/PCT at 1,604. UK, Australian and Canadian offices each carry under 1,400 records, suggesting most applicants treat the US as the primary filing jurisdiction and use PCT or EPO routes for secondary coverage.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to wide-bandgap power electronics: high frequency converter patent landscape, with the prior art for and against each one.
| Assignee | Co-assignee | Shared families |
|---|---|---|
| Koninklijke Philips N.V. (Royal Philips) | Philips Intellectual Property & Standards GmbH | 31 |
| Koninklijke Philips N.V. (Royal Philips) | Philips Norden AB | 17 |
| Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | VoiceAge Corporation | 14 |
| Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Dolby International AB | 9 |
| Koninklijke Philips N.V. (Royal Philips) | PHILIPS PATENTVERWALTUNG GMBH | 8 |
| Koninklijke Philips N.V. (Royal Philips) | PHILIPS AB | 8 |
| Siemens AG | Siemens Energy Global GmbH & Co. KG | 8 |
| Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | MULTRUS MARKUS | 7 |
Only 10 co-assignee pairs appear in the dataset, and the strongest pairings cluster around a small number of corporate families filing jointly across affiliated entities — a sign that most filers in this field file independently rather than through joint ventures.
Where to take this analysis
The dataset points to a field with real claim density in power conversion but no single controlling player — the next steps depend on whether the reader is defending, designing around, or scouting for acquisition.
Map the white space inside H02M
With 16.4% of records touching power conversion claims, a freedom-to-operate check inside that subclass before committing to a topology can save a redesign cycle later.
Explore in Eureka →Track the post-2024 filing signal
The 2021–2024 decline is real, but 2025 onward is still filling in under the publication lag — worth revisiting this trend again once those years mature.
Set up a watch in Eureka →Look past the leaders for licensing targets
With the top 10 holding only 16.3% of records, the long tail of single- and few-filing entrants may hold underleveraged claims worth a closer look.
Search the long tail in Eureka →Common questions about high frequency converter patents
No single company dominates this field. The leading assignee holds 745 of the 26,050 records in scope, but the top 5 assignees combined account for only 10.3% of all records, and the top 10 for 16.3%. That means most of the filing activity sits with a long tail of companies and individual filers rather than concentrated in a handful of large portfolios, which is unusual for a mature power-electronics subfield.
Filing peaked in 2017 at 557 records and declined afterward. Between 2021 and 2024 — a window unaffected by publication lag — filings fell from 526 to 287, a drop of 45%. Years after 2024 look even lower in raw counts, but that is largely because publication trails filing by roughly 18 months, so those figures are still filling in and should not be read as a further acceleration of the decline.
H02M, the power conversion subclass covering AC/DC and related circuitry, appears on 16.4% of the 26,050 records in scope, making it the single densest class in this dataset. H04B (general transmission) follows at 11.6%, with power supply and grid systems (H02J, 6.0%) and electric heating and lighting circuits (H05B, 5.7%) well behind. Because a single patent can carry multiple IPC codes, these percentages overlap rather than summing to 100%.
The United States receiving office carries the largest share of filings in this dataset at 8,941 records, roughly 2.4 times the next-largest office, the EPO at 3,662. WIPO/PCT filings total 1,604, with the UK, Australia and Canada each below 1,400. This pattern suggests the US is treated as the primary filing jurisdiction by most applicants, with PCT and EPO used for broader international coverage.
US5010261A, filed by North American Power Supplies and dated 1991-04-23, claims a lossless gate driver circuit for a high frequency converter using a series resonant circuit to achieve resonant, low-loss gate switching in a half-bridge configuration. It predates the main 2015–2026 filing window covered by this dataset but remains a frequently cited reference for gate-driver designs built around half-bridge switching topologies. Anyone designing a resonant or soft-switched gate driver for a high frequency converter should check this filing's claim scope before finalising a topology.
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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.