Supercapacitors Patents: Top Companies & Filing Trends 2026
- Concentration is moderate, not extreme. the leader alone accounts for 1,789 records, yet the top 5 combined hold only 20.4% of all 12,537 records in scope — filing is spread across a long tail beyond the leader.
- Filing has cooled from its 2022 peak. activity ran from 693 records in 2017 to a peak of 793 in 2022, then eased from 781 in 2021 to 597 in 2024 — a 24% pullback over that three-year span, using the last year publication lag allows us to call complete.
- This is a vehicle-electrification story as much as a capacitor one. H01M (batteries & cells) and H02J (power supply & grid) each outrank H01G (capacitors proper) in class share, and B60L (EV propulsion) sits close behind at 25.4% of records.
Filing growth compares 2021 (781 records) with 2024 (597) — 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 12,537 records in scope (CR5), not by the ranked leaders only.
What this dataset covers
This landscape is built from 12,537 published records matching supercapacitor and electric double-layer capacitor terminology combined with charge-management concepts such as state of charge, cell balancing and separator membrane design. The scope deliberately pulls in the power-electronics and vehicle-control filings that surround supercapacitor cells, not just the electrode chemistry itself, because that is where most of the recent claim activity sits.
Filing runs from 2017 through a partial 2026 cut, with a documented peak in 2022. Because publication lags filing by roughly 18 months, the 2025 and 2026 figures are undercounts rather than a genuine falloff, and any growth statement here is anchored to the 2021-2024 window instead.
Filing trend and technology composition
Two views of the same 12,537-record dataset: how filing volume has moved year over year, and how records split across the IPC subclasses that actually carry supercapacitor claims.
Filing trend, 2017-2026
Records rose from 693 in 2017 to a peak of 793 in 2022, then declined from 781 in 2021 to 597 in 2024 — a 24% pullback over that three-year window. 2025 and 2026 are still filling in under publication lag and should not be read as a continuing decline.
Technology composition by IPC subclass
H01M (batteries, cells & fuel cells) touches 38.8% of records and H02J (power supply & grid systems) 31.2%, ahead of H01G (capacitors) at 14.0% — a sign that supercapacitor claims are increasingly framed as part of hybrid energy-storage and grid systems rather than as standalone capacitor devices. B60L (EV propulsion, 25.4%) and B60W (hybrid vehicle control, 7.3%) confirm the automotive weighting. Shares add to more than 100% because records can carry several classes.
Shares are the percentage of the 12,537 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Supercapacitors Patent Landscape with Eureka
This page is one run against one query. Ask Eureka your own question about supercapacitors patent landscape and every answer comes back with the patent numbers behind it.
Try EurekaA representative claim worth reading in full
Capacitor unit with electric double layer capacitors, control method and control apparatus for the same, and accumulator system for motor vehicles
A capacitor unit with plural double layer capacitors eliminating irregularity in state of charge across the unit. The chargeable and dischargeable capacitor unit connects plural electric double layer capacitors in series, and the capacitor in a higher state of charge is selectively discharged so that the state of charge of each capacitor becomes approximately equal to the others.Filed by Nisshinbo Industries, published 2004-10-26 as US6809433B2 — a cell-balancing control patent that predates most of the vehicle-electrification filings now surrounding it.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US8210411B2 | Motor-driven surgical cutting instrument | 5,048 |
| 2 | US8573461B2 | Surgical stapling instruments with cam-driven staple deployment arrangements | 2,505 |
| 3 | US9179912B2 | Robotically-controlled motorized surgical cutting and fastening instrument | 2,132 |
| 4 | US8657174B2 | Motorized surgical cutting and fastening instrument having handle based power source | 2,100 |
| 5 | US8636736B2 | Motorized surgical cutting and fastening instrument | 1,990 |
| 6 | US8459525B2 | Motorized surgical cutting and fastening instrument having a magnetic drive train torque limiting device | 1,958 |
| 7 | US8622274B2 | Motorized cutting and fastening instrument having control circuit for optimizing battery usage | 1,919 |
| 8 | US8602287B2 | Motor driven surgical cutting instrument | 1,712 |
| 9 | US20110125176A1 | Motorized surgical cutting and fastening instrument | 1,711 |
| 10 | US20130175317A1 | Motor-driven surgical cutting instrument | 1,545 |
Citation counts favour older, earlier-filed records inside any searched corpus — read them as a signal of influence on later filers, not as a ranking of current commercial importance.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Three read-throughs of the concentration, trend and classification data above, aimed at where a new filing would actually land.
A leader, then a genuine long tail
One assignee holds 1,789 records on its own, but the next four combined only bring the top 5 to 20.4% of all records in scope, and the top 10 to 24.8%. That gap between the leader and everyone else means most of the claim space is not locked up by a small cartel of filers — it is held by dozens of mid-sized portfolios.
Volume has eased off its 2022 high
Filing peaked at 793 records in 2022 and had fallen to 597 by 2024, a 24% drop from the 2021 level of 781. That is the most recent window publication lag lets us call reliable; 2025-2026 figures will revise upward as later publications land.
Battery-class framing outweighs capacitor-class framing
H01M (batteries and cells) appears in 38.8% of records and H02J (power/grid systems) in 31.2%, both ahead of H01G (capacitors) at 14.0%. Filers are claiming supercapacitor work inside hybrid storage and grid-integration systems more often than as pure capacitor devices.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to supercapacitors patent landscape, with the prior art for and against each one.
Who is filing, and where activity is thinning
The ranked leaders span automotive OEMs, electronics conglomerates and a materials-and-components tier below them. Momentum in the latest tracked year is flat to negative across the names with the largest historical portfolios, consistent with the broader 2021-2024 pullback.
Vehicle makers anchor the top of the ranking
The leading assignee's 1,789 records reflect the automotive weighting seen across the IPC data, where B60L and B60W classes track EV propulsion and hybrid control claims tied to supercapacitor-assisted power systems.
Diversified electronics groups hold a solid middle tier
Fifth place sits at 135 records and tenth at 102, showing a gradual step-down rather than a cliff — consistent with several large diversified filers competing for the same charge-management and cell-balancing claim space.
Even the largest historical filers show little recent activity
Several of the assignees with the largest cumulative portfolios recorded zero filings in the latest tracked year, a 0% to -100% year-on-year change depending on the name. That pattern is consistent with the broader 2021-2024 volume decline rather than a single company pulling back.
| Assignee | Recent year | YoY |
|---|---|---|
| Semiconductor Energy Laboratory Co., Ltd. | 1 | 0% |
| Toyota Jidosha KK (Toyota Motor Corporation) | 0 | -100% |
| Lockheed Martin Advanced Energy Storage LLC | 0 | — |
| Panasonic Intellectual Property Management Co., Ltd. | 0 | -100% |
| Honda Motor Co., Ltd. | 0 | -100% |
| Crown Equipment Corporation | 0 | -100% |
| GS Yuasa International Ltd. | 0 | -100% |
| Nissan Motor Co., Ltd. | 0 | — |
Where to take this analysis
The dataset points to a moderately concentrated field with a cooling filing trend and a battery/grid framing that has outgrown pure capacitor claims. The next steps depend on whether the goal is freedom-to-operate, portfolio benchmarking or identifying a filing gap.
Map claim overlap before filing
With H01M, H02J and B60L classes all overlapping in the same records, a freedom-to-operate check needs to span all three rather than searching capacitor-class prior art alone.
Run a claim overlap check in EurekaTrack the assignees still filing
Several top-portfolio holders show 0% or negative year-on-year momentum, which makes recent filers — not just the largest historical holders — the ones worth watching for near-term competitive moves.
Set up assignee monitoring in EurekaCommon questions about the supercapacitor patent landscape
This landscape is built from 12,537 published records, all of which are used as the assignee-ranking denominator. It spans records published from 2015 through a partial 2026 cut-off, drawn from a search combining supercapacitor and electric double-layer capacitor terminology with charge-management concepts such as state of charge and cell balancing. Because publication lags filing by roughly 18 months, the most recent one to two years in that range are undercounted relative to their eventual totals.
The ranking covers 100 companies, with the leader holding 1,789 records and the top 5 combined accounting for 20.4% of all 12,537 records in scope. That is a moderate concentration: one clear leader, but the top 10 only reach 24.8% of the field, meaning most activity sits in a long tail of mid-sized and single-filing entrants rather than a small dominant group. The leading names span automotive OEMs and diversified electronics conglomerates rather than specialist capacitor makers alone.
Filing rose from 693 records in 2017 to a peak of 793 in 2022, then fell from 781 in 2021 to 597 in 2024, a 24% decline over that three-year span. 2024 is the most recent year that can be treated as complete; 2025 and 2026 figures will revise upward as more publications land, so they should not be read as confirming a continued drop. The honest read is a cooling trend through the last complete year, not an established multi-year decline.
H01M (batteries, cells and fuel cells) appears in 38.8% of the 12,537 records, and H02J (power supply and grid systems) in 31.2%, both ahead of H01G (capacitors proper) at 14.0%. B60L (EV propulsion, 25.4%) and B60W (hybrid vehicle control, 7.3%) show a strong automotive-electrification presence. These shares add to more than 100% because a single record can carry several IPC classes, so they should be read as overlap indicators rather than a partition of the field.
The IPC overlap data points to under-claimed intersections rather than an empty class: cell-balancing algorithms for mixed capacitor-battery packs, separator membrane behaviour under fast-charge cycling, and electrolyte stability at high state-of-charge extremes all sit across multiple classes without a dominant filer. A first claim in these zones should target the specific control or material interface rather than the device category alone, since the device-level claim space in H01G and H01M is already densely occupied.
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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.