Electrosurgical Generator Patents: Leaders & Filing Trends 2026
- Filings peaked in 2021 at 10 then fell to 2 by 2024, an 80% drop over that three-year span — the clearest signal in this dataset that the active filing window has narrowed.
- One assignee leads with 50 families against a fifth-place count of 4 and a tenth-place count of 2 — a steep drop-off after the top of the ranked list rather than a gradual taper.
- 99.1% of records sit in A61B diagnosis and surgery, with almost nothing filed against power-conversion hardware (H02M) — the claim activity is almost entirely on the surgical-system side, not the electronics.
Filing growth compares 2021 (10 records) with 2024 (2) — 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.
What this landscape covers
This landscape covers 106 published patent records filed between 2015 and mid-2026 that describe electrosurgical generators and related energy-control systems — output waveform control, tissue response sensing, return electrode monitoring, capacitive coupling risk mitigation, multi-instrument platforms and software-configurable modes. The scope is defined by title/abstract and title/claims/description search terms rather than a single IPC class, which is why the technology composition below concentrates so heavily in A61B.
Coverage runs to a data cut-off of 2026-07-31. Publication typically lags filing by around 18 months, so counts for 2025 and 2026 are still incomplete and should not be read as a decline in real filing activity.
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Filing trend and technology composition
Two views of the same 106-record set: how filing activity has moved year over year, and how those records distribute across IPC subclasses.
Filing trend, 2017–2026
Recorded filings ran from 1 in 2017 up to a peak of 10 in 2021, then declined to 2 by 2024 — an 80% fall over that three-year window. 2025 and 2026 figures are still filling in due to publication lag and should not be treated as the final word on recent activity.
IPC subclass composition
A61B (diagnosis and surgery) accounts for 99.1% of the 106 records in scope; H02M (power conversion) appears in just 0.9%. Because a record can carry more than one IPC class, these shares add up to over 100% — the takeaway is that claim activity in this dataset is concentrated almost entirely on the surgical-system side rather than the underlying power electronics.
Shares are the percentage of the 106 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Electrosurgical Generators and Energy Control with Eureka
This page is one run against one query. Ask Eureka your own question about electrosurgical generators and energy control and every answer comes back with the patent numbers behind it.
Try EurekaMost-cited records in this landscape
US20090234352A1 — Variable Capacitive Electrode Pad
An electrosurgical system built around one or more variable capacitive pads with pairs of split electrodes arranged in a capacitive configuration, connected to an electrosurgical generator. A return electrode monitoring system coupled to the split electrodes maps an initial capacitance with full pad adherence and then tracks an adherence factor from subsequent capacitance changes.Filed by Tyco Healthcare Group LP, published 2009-09-17 — cited 311 times within this landscape, making it one of the most-referenced records in the set.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | WO1995025471A2 | Moveable switchable electrosurgical handpiece | 918 |
| 2 | US6203541B1 | Automatic activation of electrosurgical generator bipolar output | 380 |
| 3 | US20090234352A1 | Variable Capacitive Electrode Pad | 311 |
| 4 | EP1051948A2 | Automatic activation of electrosurgical generator bipolar output | 294 |
| 5 | US7637907B2 | System and method for return electrode monitoring | 272 |
| 6 | US8801703B2 | System and method for return electrode monitoring | 256 |
| 7 | US8007494B1 | Device and method to prevent surgical burns | 254 |
| 8 | US7160293B2 | Multiple RF return pad contact detection system | 213 |
| 9 | US6860881B2 | Multiple RF return pad contact detection system | 195 |
| 10 | US20090036884A1 | System and method for return electrode monitoring | 151 |
Citation counts favour older filings within the searched corpus — they signal historical influence on later filers, not current technical importance.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Browse MCP servers →What the numbers say
Three read-throughs from the filing trend, the citation table and the assignee ranking.
The active filing window has narrowed
Filings ran from 10 in peak year 2021 down to 2 by 2024. That three-year drop is real activity, not an artefact of publication lag, since 2024 is the most recent year this dataset treats as complete.
One assignee dominates the ranked list
The leading assignee holds 50 families against a fifth-place count of 4 and a tenth-place count of 2, across the 14 companies the ranking covers. That is a steep drop after the leader rather than a gradual taper down the list.
Foundational claims sit early in the window
The most-cited record in this set, a moveable switchable electrosurgical handpiece, draws 918 citations — well ahead of the next tier. Heavy citation weight on older filings is expected in a searched corpus and should be read as influence, not as a sign those claims are still the most active area.
Almost all activity is on the surgical-system side
Only 0.9% of records touch H02M power-conversion hardware directly. Filers are claiming the surgical application layer — waveform control, tissue sensing, return-electrode monitoring — far more than the underlying power electronics.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to electrosurgical generators and energy control, with the prior art for and against each one.
Who holds the ground
The ranking covers 14 companies, counted in patent families, with a sharp gap between the leader and the rest of the list.
A single dominant filer
The top-ranked assignee holds 50 families in this set, far ahead of fifth place at 4. That gap is wide enough that any freedom-to-operate review in this space should start with that portfolio specifically.
A thin second tier
From fifth place downward, family counts drop quickly toward single digits, indicating a small set of companies with meaningful but modest positions rather than a broad competitive middle.
A long tail of light filers
The bottom of the ranked list holds only 2 families each, consistent with individual inventors and smaller entrants filing narrowly rather than building broad portfolios.
| Assignee | Recent year | YoY |
|---|---|---|
| Covidien LP | 0 | — |
| Covidien AG | 0 | — |
| Sherwood Services AG | 0 | — |
| Gyrus ACMI Inc | 0 | — |
| GREGG WILLIAM N | 0 | — |
| Valleylab Inc | 0 | — |
| Biosense Webster (Israel) Ltd | 0 | — |
| Apyx Medical Corp | 0 | — |
Where to take this
The landscape points to a narrow window of active filing concentrated around one dominant portfolio, with the surgical-application layer far more contested than the underlying power electronics.
Map freedom-to-operate against the leader's portfolio
With one assignee holding 50 of the ranked families, any new filing on output waveform control, tissue sensing or return-electrode monitoring should be checked against that portfolio before drafting claims.
Run a freedom-to-operate check in Eureka →Test the under-claimed branches
Power-conversion hardware and multi-instrument interoperability show comparatively little dedicated claim density in this dataset relative to the surgical-application side, which is worth probing for open claim space.
Explore white space in Eureka →Watch for the next filing wave
2025–2026 counts are still incomplete due to publication lag; re-running this landscape in a year will show whether the 2021 peak was a one-off or part of a longer cycle.
Set up monitoring in Eureka →Common questions on this landscape
One assignee dominates this landscape with 50 patent families, well ahead of the fifth-ranked company at 4 families. The ranking covers 14 companies in total, counted by family, and the drop-off after the leader is steep rather than gradual. Anyone entering this space for freedom-to-operate purposes should treat that leading portfolio as the primary point of review, since the rest of the ranked list holds comparatively modest positions.
Filing activity peaked in 2021 at 10 records and had fallen to 2 by 2024, an 80% decline over that three-year span. That is the most recent period this dataset treats as reliably complete, since publication typically lags actual filing by around 18 months. Figures for 2025 and 2026 are still filling in, so they should not yet be read as confirmation of a continued decline.
Within this dataset, 99.1% of the 106 records fall under IPC subclass A61B, which covers diagnosis and surgery, while only 0.9% touch H02M power-conversion hardware. That split shows claim activity is concentrated on the surgical-system side — output waveform control, tissue response sensing, return electrode monitoring — rather than on the underlying generator electronics. A record can carry more than one IPC class, so these shares add up to over 100%.
US20090234352A1, assigned to Tyco Healthcare Group LP and published in 2009, describes an electrosurgical system using variable capacitive pads with split-electrode pairs connected to a generator, paired with a return electrode monitoring system that tracks pad adherence via changes in measured capacitance. It is one of the most-cited records in this landscape, with 311 citations recorded here, making it a foundational reference point for later return-electrode monitoring designs. Anyone designing a capacitance-based adherence or monitoring feature for a dispersive electrode should review this filing's claim scope directly rather than relying on the abstract alone.
Based on IPC composition, the H02M power-conversion side of these systems carries far less dedicated claim density than the A61B surgical-application layer, which accounts for 99.1% of the 106 records. Sub-areas such as software-configurable mode switching, capacitive coupling risk detection, and multi-instrument platform interoperability also show comparatively light representation relative to the core waveform and monitoring claims. These are reasonable areas to probe further, though confirming true openness requires a dedicated freedom-to-operate search rather than composition data alone.
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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.