Electrosurgical Generator Patents: Top Companies & Trends 2026
- 82.3% of all 693 records sit with just five assignees, making this one of the more concentrated corners of surgical energy device IP.
- Filing peaked in 2018 at 25 records and the 2022 midpoint of 19 shows momentum has since gone flat rather than continuing to climb.
- Power-conversion and frequency-control classes H02M, G01R and H03L each sit under 5% of records, well behind the dominant A61B surgical class.
What this landscape covers
This landscape maps 693 published records at the intersection of electrosurgical generators, vessel-sealing devices and the safety and feedback mechanisms around them — tissue impedance feedback, thermal spread control, smoke evacuation, bipolar sealing and capacitive coupling safety. The scope is bounded by IPC classes A61B18, A61B17 and H02M7, capturing both the surgical end-effector side of the technology and the underlying power electronics that drive it.
Coverage runs from 2015 through the 2026-07-31 data cut-off. Because publication typically lags filing by roughly 18 months, the most recent one or two years in any trend chart will understate actual filing activity and should be read as provisional rather than final.
Filing trends and technology composition
Two views of the same 693-record dataset: how filing activity has moved year over year, and which IPC subclasses the records fall into.
A field that peaked in 2018 and has since plateaued
Filings rose from 8 in 2017 to a peak of 25 in 2018. By the 2022 midpoint activity had settled at 19, and it has not resumed a clear upward trend since — consistent with a mature, well-occupied claim space rather than an emerging one.
Surgical claims dominate; power electronics are a minority share
A61B (diagnosis and surgery) appears on 99.7% of the 693 records in scope, effectively defining the corpus. H02M (power conversion) at 4.9%, G01R (electric and magnetic measurement) at 2.9% and H03L (frequency and phase control) at 2.3% show that the underlying generator electronics are claimed far less densely than the end-effector and tissue-interaction mechanics, even though a working generator depends on both.
Shares are the percentage of the 693 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 Devices with Eureka
This page is one run against one query. Ask Eureka your own question about electrosurgical generators and devices and every answer comes back with the patent numbers behind it.
Try EurekaThe most-cited prior art and a recent representative filing
Surgical systems and methods utilizing temperature for predicting and/or controlling thermal spread
An electrosurgical system includes an end effector assembly with first and second jaw members, each defining an electrically-conductive tissue-contacting surface, with at least one jaw movable between spaced-apart and approximated positions for grasping tissue. At least one temperature sensor is associated with the end effector assembly, and an electrosurgical generator supplies energy for treating the grasped tissue. The generator receives sensed temperature data and includes a controller configured, in real time, to adjust output based on that feedback.Filed by Covidien LP, published 2024-08-01 — illustrates the field's current direction toward temperature-based, closed-loop thermal spread control rather than purely impedance-based feedback.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US6033399A | Electrosurgical generator with adaptive power control | 2,583 |
| 2 | US7776037B2 | System and method for controlling electrode gap during tissue sealing | 1,971 |
| 3 | US6228080B1 | Electrosurgical generator with adaptive power control | 1,921 |
| 4 | US8562598B2 | Electrosurgical system | 1,638 |
| 5 | US8147485B2 | System and method for tissue sealing | 1,602 |
| 6 | US7828794B2 | Handheld electrosurgical apparatus for controlling operating room equipment | 1,475 |
| 7 | US9283028B2 | Crest-factor control of phase-shifted inverter | 1,029 |
| 8 | US9192430B2 | Electrosurgical instrument with time limit circuit | 1,019 |
| 9 | US9144455B2 | Low power tissue sealing device and method | 1,013 |
| 10 | EP0870473A2 | Electrosurgical generator with adaptive power control | 874 |
Citation counts accumulate over time, so older records such as the two 1990s-2000s filings on adaptive power control lead the table by a wide margin. Treat this as a measure of historical influence on the field, not of current filing activity.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Three patterns stand out once the records are broken down by assignee, class and year.
The leader board is short and the tail is long
Five assignees hold 570 of the 693 records in scope, and the top ten extend that to 92.2%. A single leader alone accounts for 250 records, roughly a third of the entire corpus. New entrants are filing into a space where a handful of incumbents already hold the dominant claim positions.
Growth has flattened, not accelerated
Filing activity climbed from 8 records in 2017 to a peak of 25 in 2018, then settled to 19 by the 2022 midpoint. Recent-year figures for individual assignees show declines rather than gains — one leading filer is down 75% year over year, another down 100% — though the most recent one to two years are understated by publication lag.
Power electronics are thinly claimed relative to end-effector mechanics
Almost every record in scope touches A61B surgical claims, but only 4.9% touch H02M power-conversion claims and 2.3% touch H03L frequency-control claims. The generator's power-delivery and control electronics are claimed far less densely than the tissue-contacting hardware around them.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to electrosurgical generators and devices, with the prior art for and against each one.
| Assignee | Co-assignee | Shared families |
|---|---|---|
| Covidien AG | Cardinal Health 529 LLC | 9 |
| The Regents of the University of Colorado | TYCO HEALTHCARE GRP LP D B A COVIDIEN | 7 |
| Covidien LP | VIVANT MEDICAL INC | 2 |
| APPL MEDICAL RESOURCES CORP | YAWATA HARUYASU | 1 |
| APPL MEDICAL RESOURCES CORP | WIXEY MATTHEW A | 1 |
| APPL MEDICAL RESOURCES CORP | WIKOFF CHRIS R | 1 |
| APPL MEDICAL RESOURCES CORP | TRAN OLIVA J | 1 |
| APPL MEDICAL RESOURCES CORP | PRAVONGVIENGKHAM KENNII | 1 |
Only 10 co-assignee pairs appear in the dataset, and the strongest pairing links two related corporate entities rather than independent organisations — this is a field of largely solo-owned filings, not joint development.
Who holds the claim space, and where it thins out
The ranking covers 50 companies, counted by patent family. A small group of incumbents dominates by volume; recent-year momentum has cooled even for the leaders.
One filer holds roughly a third of the corpus
The top-ranked assignee's 250 records dwarf the fifth-place total of 16 and the tenth-place total of 12, a gap that signals a deeply entrenched position built up over years of continuation filings around core generator and sealing patents.
A sharp drop-off after the top few
Filing volume falls away quickly outside the leading names: fifth place holds 16 records and tenth place 12, a fraction of the leader's total. This is a winner-heavy field rather than an evenly spread one.
Even active filers are pulling back
Recent-year momentum figures show declines across the assignees tracked, including a 75% year-over-year drop for one filer and a 100% drop for another. Several established names show zero filings in the latest year, though publication lag means this year's true count will rise as more filings publish.
| Assignee | Recent year | YoY |
|---|---|---|
| APPL MEDICAL RESOURCES CORP | 1 | -75% |
| Covidien LP | 0 | — |
| Covidien AG | 0 | — |
| Sherwood Services AG | 0 | — |
| Invuity Inc | 0 | — |
| GI Scientific LLC | 0 | -100% |
| Stryker European Operations Limited | 0 | — |
| Conmed Corp | 0 | — |
Where to take this analysis
The landscape points to a concentrated, flattening field with specific under-claimed branches. The next steps depend on whether you are clearing a design or scouting a gap.
Run a freedom-to-operate check against the top assignees
With 82.3% of records held by five companies, any new electrosurgical generator or sealing device design should be checked against their active claims before development goes further.
Explore assignee portfolios in EurekaMap the white space in generator-side electronics
H02M, G01R and H03L classes remain thinly claimed relative to A61B. A first-claim search focused on power conversion and frequency control could surface open filing positions.
Search IPC white space in EurekaTrack the shift toward temperature-based feedback
The most recent representative filing moves from impedance feedback toward real-time temperature prediction for thermal spread control, a direction worth monitoring for follow-on filings.
Set up a filing alert in EurekaCommon questions about this landscape
The dataset's assignee ranking is led by a single company holding 250 of the 693 records in scope, with the top five assignees together accounting for 82.3% of all records. That gap between the leader and the fifth-ranked assignee, which holds 16 records, shows a field where one incumbent's portfolio dominates by sheer volume. Anyone assessing competitive risk in this space should start by reviewing that leader's claim scope before looking at the rest of the field.
Filing activity peaked at 25 records in 2018 and had settled to 19 by the 2022 midpoint, which points to a flat or slightly declining trend rather than continued growth. Recent-year momentum figures for individual assignees reinforce this, with declines of 75% and 100% year-over-year for two tracked filers. That said, publication typically lags filing by around 18 months, so the last one to two years in any count will understate true activity until later filings publish.
The corpus is dominated by A61B surgical and end-effector claims, present on 99.7% of the 693 records, while the power electronics and control classes that actually drive the generator are far thinner: H02M power conversion sits at 4.9%, G01R measurement at 2.9%, and H03L frequency control at 2.3%. That gap suggests generator-side power conversion, frequency locking and capacitive coupling safety circuitry are comparatively open relative to the densely claimed tissue-contacting mechanics.
US20240252232A1, filed by Covidien LP and published 2024-08-01, covers an electrosurgical system with an end-effector assembly whose jaw members carry a temperature sensor, paired with a generator controller that adjusts output in real time based on sensed temperature to predict and control thermal spread. It represents a shift from purely impedance-based feedback toward temperature-based closed-loop control. Because it is a published application rather than a granted patent as of the data cut-off, its final claim scope may still narrow during prosecution, so it is worth tracking rather than treating as settled law.
Very concentrated: the top ten assignees in the 50-company ranking together hold 92.2% of the 693 records in scope, and the top five alone hold 82.3%. This leaves a long tail of the remaining ranked companies each holding only a handful of records. For a new entrant, this means most of the productive claim space around vessel sealing and tissue impedance feedback is already occupied by a small number of established players.
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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.