Active Debris Removal Patents: Who Leads, Where the Gaps Are 2026
Filing growth compares 2021 (830 records) with 2024 (531) — 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 384,952 records in scope (CR5), not by the ranked leaders only.
What the active debris removal patent record actually shows
Active debris removal (ADR) sits at the intersection of orbital mechanics, robotics, and space traffic coordination. The search scope captured here spans 384,952 published records filed or published between 2015 and mid-2026, indexed against the term “Active Debris Removal” and its constituent concepts. The dataset covers assignees ranging from national space agencies to commercial satellite operators and university research arms, and the IPC composition below shows the claim activity spilling into general engineering, materials, and sensing classes well beyond a narrow orbital-mechanics core.
Because publication trails filing by roughly 18 months, the most recent one to two years in any trend line will always look thinner than the true filing rate. Treat 2025 and 2026 figures as provisional floors, not evidence of a slowdown, and anchor any growth conclusion to the last complete year available.
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Filing trend and technology composition
Two views of the same 384,952-record scope: how filing activity has moved year over year, and which IPC subclasses carry the claim density.
Filing trend, 2017-2026
Filings rose from 733 in 2017 to a peak of 957 in 2019, then declined to 531 by 2024 — a 36% drop from the 2021 level of 830. The 2025-26 figures (down to 49 by 2026) reflect publication lag rather than a confirmed collapse in filing activity; only 2024 and earlier should be read as a stable trend.
Technology composition by IPC subclass
Class shares are measured against the full 384,952-record scope and sum to more than 100% because a single record commonly carries several IPC codes. The leading subclass, A61K, still accounts for only 1.5% of records, and every subsequent class sits below 1% — a signature of a field whose claim activity is spread thinly across many technical approaches rather than concentrated in one dominant classification.
Shares are the percentage of the 384,952 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Space-Domain Awareness & Debris: Active Debris Removal Patent Landscape with Eureka
This page is one run against one query. Ask Eureka your own question about space-domain awareness & debris: active debris removal patent landscape and every answer comes back with the patent numbers behind it.
Try EurekaA representative claim in the space
Space traffic management system, debris removal method, debris removal business device, first mega-constellation business device, second mega-constellation business device, and oadr
The filing describes a space traffic management system in which management devices mounted across multiple mega-constellation operators and a debris removal business device communicate over a shared line. The debris removal device performs active debris removal against debris formed by a satellite belonging to one mega-constellation operator, while acquiring real-time high-accuracy orbital data on a second operator's satellite group during the debris satellite's descent window.Filed by Mitsubishi Electric Corporation, published 2023-10-26 as US20230339627A1.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20030157108A1 | Glycoprotein compositions | 4,090 |
| 2 | US4827911A | Method and apparatus for ultrasonic surgical fragmentation and removal of tissue | 2,382 |
| 3 | WO1995024471A1 | Novel alkaline cellulases | 2,045 |
| 4 | US6491690B1 | Electrosurgical instrument | 1,979 |
| 5 | EP0923907A1 | An electrosurgical instrument | 1,942 |
| 6 | WO1999003409A1 | An electrosurgical instrument | 1,936 |
| 7 | WO1999003407A1 | An electrosurgical instrument | 1,935 |
| 8 | US6050990A | Methods and devices for inhibiting hair growth and related skin treatments | 1,923 |
| 9 | US4766106A | Solubilization of proteins for pharmaceutical compositions using polymer conjugation | 1,847 |
| 10 | US7052494B2 | Surgical system and method | 1,771 |
Citation counts reward older filings that have had more time to accumulate citations within the searched corpus — read them as a signal of influence on subsequent filings, not as a ranking of current technical importance.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Three read-throughs from the concentration, trend, and jurisdiction figures above.
No single assignee owns the field
The five leading assignees together hold 7.8% of all 384,952 records in scope, and the top 10 add up to only 11.1%. That leaves the overwhelming majority of filings spread across a long tail of single- or few-filing entrants, which means freedom-to-operate risk is diffuse rather than concentrated on one blocking portfolio.
Read the recent years as incomplete, not declining
Filings fell from 830 in 2021 to 531 in 2024, a genuine three-year contraction from the 2019 peak of 957. The further drop shown in 2025-26 data is an artefact of the roughly 18-month publication lag and should not be read as a continuation of that decline until later years fill in.
US filings lead, EPO and PCT trail well behind
The United States receiving office accounts for 9,329 records, more than double the European Patent Office's 3,399 and well ahead of WIPO's PCT route at 2,862. Australia, Canada and the UK each sit under 1,700, indicating that examination exposure and prior-art risk concentrate most heavily in US filings.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to space-domain awareness & debris: active debris removal patent landscape, with the prior art for and against each one.
Where to take this next
The figures above describe the shape of the field. Turning that into a filing or freedom-to-operate decision means drilling into specific claims and specific assignees.
Check freedom-to-operate against the leading assignee
With the top filer holding 13,896 records but no assignee controlling more than a small share of the field, a targeted clearance search against the leading portfolios is more useful than assuming broad blocking coverage.
Run a freedom-to-operate check in EurekaTrack the under-claimed branches before they fill in
Thin IPC density in sensor fusion, data-sharing protocols and post-capture propulsion sequencing suggests room for a first claim now, before the next filing wave publishes.
Explore white space in EurekaWatch how the 2024-26 numbers resolve
The apparent decline after 2021 is partly a publication-lag artefact. Re-check the trend once 2025 filings finish publishing to see whether the contraction is real or an artefact of the data cut-off.
Set a filing-trend alert in EurekaCommon questions on active debris removal patents
The leading assignee in the ranked field holds 13,896 records, well ahead of the fifth-ranked assignee at 3,232 and tenth-ranked at 1,922. However, the top 5 assignees combined account for only 7.8% of all 384,952 records in scope, and the top 10 for 11.1%, so no single company controls the claim space. The field is better described as fragmented with one moderately ahead leader than as dominated by a single player.
Filings rose from 733 in 2017 to a peak of 957 in 2019, then fell to 531 by 2024 — a 36% decline from the 2021 level of 830. Figures for 2025 and 2026 look lower still, but that reflects the roughly 18-month lag between filing and publication rather than a confirmed drop in activity. The safest read is that filing volume genuinely eased off its 2019 peak through 2024, with the very latest years still an open question.
The United States receiving office leads with 9,329 records, more than double the European Patent Office's 3,399 and ahead of the WIPO PCT route at 2,862. Australia (1,664), Canada (1,394) and the United Kingdom (473) trail well behind. That pattern suggests US filings carry the bulk of examination and prior-art exposure for anyone assessing risk in this space.
IPC subclass shares are measured against the full 384,952-record scope, and even the top class, A61K, covers only 1.5% of records, with every other class below 1%. That thin, distributed spread across many IPC subclasses indicates the field draws on a wide range of technical disciplines rather than concentrating around one dominant classification. It also means claim density in any single subclass is relatively low, leaving room for specific, well-drafted claims.
With technology composition spread thinly across many IPC subclasses and no assignee holding more than a small share of overall filings, several operational sub-areas remain lightly claimed relative to the core debris-capture and deorbit clusters. Candidates worth checking include multi-operator orbital data-sharing protocols, debris-satellite sensor fusion for rendezvous, and post-capture propulsion sequencing. A targeted prior-art search in each is a more reliable way to confirm genuine white space than inferring it from aggregate IPC shares 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.