Subsurface Drip Irrigation Patents: Leaders, Trends & White Space 2026
- Concentrated at the top. The top 5 assignees hold 55.0% of all 120 records in scope, and the top 10 hold 79.2% — a narrow group of filers controls most of the documented claim space.
- Filing has cooled from its 2021 peak. Filings ran 8 in 2021, the peak year so far, down to 1 in 2024 — an 88% drop over that three-year span, though 2025-26 counts are still filling in due to publication lag.
- Horticulture claims dominate, pipe hardware barely registers. A01G (horticulture & forestry) touches 66.7% of records while F16L (pipes & fittings) sits at just 10.8% — most of the documented invention is agronomic, not mechanical.
Filing growth compares 2021 (8 records) with 2024 (1) — 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 120 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
This landscape covers 120 published records matched on subsurface drip irrigation and buried dripline systems, filtered to documents that also address root intrusion, installation depth, wetting pattern, vacuum relief, soil backflow or field longevity — the operational problems that separate a buried emitter system from surface drip. The scope runs from 2015 through the 2026-07-31 data cut-off, with the most recent one to two years understated because publication typically lags filing by around 18 months.
The field sits at the intersection of horticulture engineering and materials chemistry: dripline tube construction, root-repellent coatings and biocide release sit alongside pest control and even medicinal-preparation classifications, reflecting how often anti-root and anti-clog chemistry gets claimed inside an irrigation hardware filing.
Filing trend and technology composition
Two views of the same 120 records: how filing activity has moved year over year, and which IPC subclasses the claims fall into.
A 2021 peak, then a fast falloff
Filings rose to 8 in 2021, the peak year so far, then fell to 1 by 2024 — an 88% decline across that span. Because publication lags filing by roughly 18 months, 2025 and 2026 figures are still incomplete and should not be read as confirmation that the technology has stopped moving; they simply have not finished publishing yet.
Horticulture and agrochemical classes lead by a wide margin
A01G (horticulture & forestry) appears on 66.7% of the 120 records and A01N (biocides/agrochemicals) on 38.3%, well ahead of A61K (medicinal preparations, 15.8%), A01M (pest control, 14.2%) and F16L (pipes & fittings, 10.8%). Because a single record can carry several IPC classes, these shares sum to more than 100% — the pattern still shows that agronomic and chemical claims outweigh pure pipe/hardware engineering in this corpus.
Shares are the percentage of the 120 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Subsurface Drip Irrigation with Eureka
This page is one run against one query. Ask Eureka your own question about subsurface drip irrigation and every answer comes back with the patent numbers behind it.
Try EurekaRepresentative and most-cited filings
US20160330918A1 — Root intrusion protection of subsurface drip irrigation pipe
A subsurface drip irrigation tube with a releasable-herbicide first layer on its inner surface and a second barrier layer that directs the herbicide into the flow path so it exits through the drippers rather than diffusing outward — the mechanism is built to suppress root intrusion around the emitter without releasing herbicide into the surrounding soil generally.Filed by A.I. Innovations N.V., published 2016-11-17.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20090186096A1 | Applications of microencapsulated essential oils | 125 |
| 2 | US6161776A | Multi-layered, porous mat turf irrigation apparatus and method | 79 |
| 3 | WO2007094000A2 | Applications of microencapsulated essential oils | 60 |
| 4 | US6821928B2 | Method to reduce the rate of diffusion of slow-release materials through polymers and process for making drip… | 55 |
| 5 | US20050279856A1 | Water-conserving surface irrigation systems and methods | 53 |
| 6 | US20060255186A1 | Anti-syphon emitter | 40 |
| 7 | US7445168B2 | Anti-syphon emitter | 40 |
| 8 | US8753676B2 | Applications of microencapsulated essential oils | 26 |
| 9 | WO2003039251A1 | Method to reduce the rate of diffusion of slow-release materials through polymers and process for making drip… | 24 |
| 10 | US20030092817A1 | Method to reduce the rate of diffusion of slow-release materials through polymers and process for making drip… | 19 |
Citation counts are drawn from a searched corpus and skew toward older filings; treat them as a signal of influence rather than of current 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 mean for a filing decision
Three figures worth acting on before drafting or clearing a new subsurface drip irrigation claim.
Most prior art sits with a small group
With the top 5 assignees covering 55.0% of all 120 records and the top 10 covering 79.2%, freedom-to-operate work in this space is largely a check against a short list of filers rather than a diffuse field. The remaining assignees each hold a handful of records at most.
Peak filing has passed, but the picture is incomplete
Filings dropped from a peak of 8 in 2021 to 1 in 2024, an 88% fall. That is a real slowdown in what has finished publishing, but 2025-26 filings are still arriving given the typical 18-month publication lag, so this should not yet be read as the field going quiet.
Agronomic claims outnumber hardware claims
A01G (horticulture & forestry) touches two-thirds of the 120 records while F16L (pipes & pipe fittings) touches roughly a tenth. Most of the documented invention addresses plant/soil interaction — root behaviour, wetting pattern, biocide release — rather than pipe or fitting mechanics.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to subsurface drip irrigation, with the prior art for and against each one.
Who is filing, and what is left open
The ranked leaders hold most of the volume, but the recent-year momentum figures show even the largest historical filers have gone quiet in the latest complete year — a sign the next wave of claims has not yet been staked out.
A single filer well ahead of the field
The leading assignee holds 21 of the 120 records in scope, roughly double the fifth-place holder's 9. That gap suggests a company that built a sustained filing programme around subsurface dripline hardware and root-management chemistry rather than one or two opportunistic filings.
A fast drop-off after the top five
Volume falls from 9 records at fifth place to 4 at tenth, and the top 10 combined already account for 79.2% of all 120 records. Everyone ranked below that holds a small handful of filings each.
The historical leaders have stopped filing recently
Every assignee tracked for recent-year momentum, including the field leader, shows 0 filings in the latest year. Combined with the 2021 filing peak, this points to a maturing wave of claims rather than an active filing race — though publication lag means the newest activity may not yet be visible.
| Assignee | Recent year | YoY |
|---|---|---|
| A.I. Innovations N.V. | 0 | — |
| Botanocap Ltd. | 0 | — |
| Nibco Inc. | 0 | — |
| RUSKIN RODNEY | 0 | — |
| METZERPLAS COOP AGRI ORG LTD | 0 | — |
| E.I. du Pont de Nemours & Co. | 0 | — |
| Netafim Ltd. | 0 | — |
| Cast Environmental Solutions LLC | 0 | — |
Where to take this
The dataset points to specific next steps depending on whether you are drafting, clearing, or scouting for licensing targets.
Check freedom-to-operate against the top 10
With 79.2% of all 120 records held by ten assignees, a targeted FTO search against that group covers most of the documented claim space before broadening further.
Run an FTO check in EurekaDraft into the under-claimed branches
Vacuum relief, non-herbicide root-repellent coatings and installation-depth sensing show thinner coverage than the dominant horticulture and biocide classes — worth a closer novelty search before assuming the space is crowded.
Explore white space in EurekaWatch for the next filing wave
Recent-year momentum sits at zero across the tracked leaders, but 2025-26 records are still publishing. Revisit this trend in a future cut to see whether filing has genuinely paused or is simply lagging.
Track filing trends in EurekaCommon questions about subsurface drip irrigation patents
One assignee leads clearly with 21 of the 120 records in scope, roughly double the fifth-ranked holder's 9 records. The top 5 assignees together account for 55.0% of all records and the top 10 for 79.2%, so a small group controls most of the documented claim space. The full ranking covers 34 assignees, most of them holding only a handful of filings, which means the long tail is genuinely thin rather than evenly spread.
Filing peaked at 8 records in 2021 and fell to 1 by 2024, an 88% decline over that span. That is a real slowdown in what has finished publishing, but publication typically lags filing by around 18 months, so 2025 and 2026 numbers are still incomplete. Treat the recent drop as the last confirmed data point rather than proof the field has gone cold.
The dominant classes are A01G (horticulture & forestry), covering 66.7% of the 120 records, and A01N (biocides/agrochemicals) at 38.3%, reflecting how much of the invention here concerns plant and soil interaction rather than pipe hardware. Medicinal preparations (A61K, 15.8%) and pest control (A01M, 14.2%) also appear frequently, often tied to root-repellent or anti-clog chemistry embedded in the dripline itself. Pure pipe and fitting engineering (F16L) is comparatively minor at 10.8%, since records can carry multiple classes these figures sum above 100%.
The filing, from A.I. Innovations N.V. and published in 2016, claims a dripline tube with a releasable-herbicide layer on its inner surface and a second barrier layer that directs the herbicide through the flow path and out the dripper rather than letting it diffuse into the surrounding soil. That specific mechanism — herbicide-in-flow-path routing via a dedicated barrier layer — is what a new design needs to clear, not root suppression in general. Designs using non-chemical root barriers, physical dripper geometry, or coatings applied outside the flow path sit outside the literal claim scope described in the abstract.
Vacuum relief valve design for buried emitters, non-herbicide root-repellent coatings, and installation-depth sensing all show thinner coverage than the dominant horticulture and biocide classes in this corpus. These sit adjacent to the crowded root-intrusion and wetting-pattern claims but are not saturated by the same handful of leading assignees. A first claim in these areas would likely focus on the physical or sensing mechanism rather than the agrochemical formulations that dominate the current filings.
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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.