Smart Irrigation Control Patents: Who Leads, Where the Gaps Are 2026
- Filing is accelerating, not maturing. Annual filings sat near zero through the early 2020s and only picked up from 2022, reaching a peak of 7 records in 2025 — this is a field still in its early buildout, not one settling into incumbents.
- India dominates the filing map. 18 of the 26 families in this set were filed at the Indian receiving office, far ahead of China's 4 and single digits everywhere else — a strong signal about where near-term freedom-to-operate pressure will concentrate.
- The founding patent still casts a long shadow. US4176395A, filed by Clemar Manufacturing in 1979, carries 265 citations — more than ten times the next most-cited record — and its valve-scheduling claims sit underneath almost everything filed since.
Top-5 share is the combined record count of the five largest assignees divided by all 26 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
This review covers 26 patent families published between 2015 and mid-2026 that combine irrigation control terminology with closed-loop, feedback or sensor-based control claims, filtered against the control-systems IPC classes A01G25/16, G05D7 and G05B13. The set is small by the standards of mature hardware categories, which is itself informative: claim space here is still being staked out, not fought over.
Because publication typically lags filing by around 18 months, the 2025 and 2026 figures in any trend line understate real filing activity — the true peak year is likely higher than currently visible, and 2026 in particular will keep climbing as later applications publish.
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Filing trends and technology composition
Two views of the same 26 families: how filing activity has moved year over year, and which IPC subclasses the claims actually sit in.
A late, steep ramp
Filings were essentially flat and sparse from 2017 through the early 2020s, with the 2022 midpoint showing no recorded filings at all. Activity then accelerated sharply toward the 2025 peak of 7 records, consistent with a technology moving from academic and pilot work into commercial filing.
Horticulture claims anchor a control-systems overlay
Every record in this set sits in A01G (horticulture and forestry), as expected from the search construction, but the next-largest classes are G06Q (business and administrative data processing, 12 records) and G05B (control and regulating systems, 9 records). That pairing — irrigation hardware claims layered with data-processing and control-loop claims — is the structural signature of this field: fewer pure mechanical-valve patents, more claims over scheduling logic, decision algorithms and sensor feedback loops.
Shares are the percentage of the 26 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Smart Irrigation System Control System with Eureka
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Try EurekaThe prior art doing the most work
US4176395A — Interactive irrigation control system
An irrigation control system and related method for controlling a large number of valves according to multiple user-defined schedules, with schedules editable during operation via keyboard and display, and with digital inputs from field sensors able to condition execution of those schedules.Filed by Clemar Manufacturing Corporation, granted 1979-11-27, cited 265 times — by far the most-cited record in this set.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US4176395A | Interactive irrigation control system | 265 |
| 2 | WO1997028692A1 | Irrigation control system | 23 |
| 3 | JP1996140508A | Automatic irrigation control unit | 18 |
| 4 | IN202041009997A | Method for smart irrigation using wireless internet of things sensor network | 5 |
| 5 | CN110506616A | 一种地下滴灌反馈控制系统 | 2 |
| 6 | CN207665703U | 一种组合式种植系统控制装置 | 2 |
| 7 | CN206251707U | 一种新型用于农业灌溉节水的调节器装置 | 2 |
| 8 | CN205648591U | 一种太阳能同步作业自动灌溉系统 | 1 |
Citation counts favour older, longer-indexed records; treat this as a map of influence on the field rather than a ranking of current commercial relevance.
Patent titles are shown in the language they were filed in, not translated, so that each record stays verifiable against the original filing — a translated title will not match in Eureka or in any national register. Publication numbers are shown where the record carries one (8 of 8 rows); clicking a row searches Eureka by that number.
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Browse MCP servers →What the numbers imply
Three patterns stand out once family counts, IPC composition and receiving offices are read together.
Growth is compressed into the last few years
With the 2022 midpoint showing zero filings and the 2025 peak at 7, nearly all activity in this set is concentrated in a narrow recent window. That compresses competitive positioning: there is little multi-decade portfolio depth to out-flank, but also little precedent for how examiners will treat the control-loop claims now arriving.
India is the primary filing venue, not a secondary one
Two-thirds of the tracked families were filed at the Indian receiving office, with China a distant second at 4 and every other jurisdiction in single digits. Any freedom-to-operate check for this technology should start in India, not default to the US or China playbook common in other hardware categories.
Data and business-logic claims outnumber pure control claims
G06Q (business/admin data processing) appears in 12 of 26 records, ahead of G05B control-systems claims at 9. Filers are increasingly claiming the scheduling and decision layer around irrigation, not just the valve or sensor hardware — a pattern worth checking before assuming a hardware-only design avoids infringement.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to smart irrigation system control system, with the prior art for and against each one.
Who is filing, and how thin the field still is
With only 26 families total and 10 co-assignee pairs, no single organisation has established durable multi-year momentum yet — recent-year activity is a better guide than historical volume.
Academic filers are setting the current pace
SR University shows the strongest recent-year activity in this set at 2 filings, ahead of Nitte (Deemed to be University) at 1. Several other named assignees, including established filers like Tsinghua University, show zero filings in the latest year, suggesting first-mover advantage here is recent and still contestable.
Collaboration is real but shallow
Ten co-assignee pairs exist across 26 families, each appearing once — there is no repeat-collaboration cluster yet, including the strongest pairing between Tsinghua University and Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences. This is consistent with a field where institutions are still forming partnerships rather than running established joint filing programmes.
The competitive map is not where incumbents expect
Filers accustomed to tracking US and Chinese agtech portfolios will find limited signal there: only 1 US and 4 China filings appear against 18 from India. Monitoring should weight Indian academic and corporate filers accordingly.
| Assignee | Recent year | YoY |
|---|---|---|
| SR UNIVERSITY | 2 | — |
| NITTE(DEEMED TO BE UNIV) | 1 | 0% |
| POWERHORSE CORP | 0 | — |
| Tsinghua University | 0 | — |
| Wopusheng (Beijing) Agricultural Technology Co., Ltd. | 0 | — |
| Zhang Baolan | 0 | — |
| Guangzhou University | 0 | — |
| Director of the Grassland Experiment Station, Ministry of Agriculture, Forestry and Fisheries | 0 | — |
Where to take this analysis
The dataset points to specific next steps depending on whether the goal is freedom-to-operate, portfolio strategy or identifying open claim territory.
Check India-first freedom-to-operate
With 18 of 26 families filed via India, any commercial deployment plan should run an India-specific clearance search before assuming US or China precedent applies.
Explore in Patsnap Eureka →Map the data-layer overlap
G06Q claims appear almost as often as G05B control claims — worth a dedicated search pass on scheduling and decision-logic claims layered over irrigation hardware.
Explore in Patsnap Eureka →Track recent-year filers, not historical volume
Momentum has shifted to newer academic filers; a watch list built on 2024-2026 activity will surface different names than one built on total family counts.
Explore in Patsnap Eureka →Common questions about smart irrigation control patents
This landscape tracks 26 patent families published between 2015 and mid-2026 that combine irrigation control terminology with closed-loop, sensor-based or feedback-control claims under the relevant control-systems IPC codes. That is a small dataset compared with mature agtech hardware categories, reflecting that this specific combination of irrigation and control-loop claiming is still emerging. Because publication lags filing by roughly 18 months, the true current total is likely somewhat higher than what has published so far.
No single organisation holds a dominant historical position in this dataset; filing is spread across academic institutions and smaller corporate filers with limited overlap between them. Recent-year momentum favours newer entrants such as SR University over historically cited names, meaning today's visible incumbents are not necessarily tomorrow's leaders. Anyone building a competitive watch list should weight recent-year filing activity over cumulative counts given how young this field is.
India is the dominant receiving office in this dataset, accounting for 18 of the 26 tracked families, well ahead of China's 4 and single-digit counts everywhere else including the United States. This is a notable departure from the US/China-centric pattern seen in many other agtech and IoT categories. Teams evaluating freedom-to-operate risk in this space should prioritise Indian patent searches rather than defaulting to US or Chinese portfolios.
US4176395A, granted in 1979 to Clemar Manufacturing Corporation, describes an irrigation control system that manages many valves against user-editable schedules while incorporating digital sensor inputs to condition when those schedules execute. It is the most-cited record in this landscape by a wide margin, with 265 citations against a next-highest of 23. Its influence shows up structurally: the core idea of sensor-conditioned, schedule-based valve control underlies much of what later filings build on, even where the specific sensing or communication technology has moved on.
The clearest gaps sit at the intersection of irrigation hardware and the data or AI layer above it: multi-zone soil-moisture fusion, closed-loop fertigation feedback, AI-driven demand forecasting, weather-integrated scheduling and low-power sensor-mesh control are all present in the dataset's IPC composition (G06N, G01W, H04L) but only lightly claimed. With G06Q and G05B claims already common but G06N appearing in just 4 of 26 records, algorithmic and forecasting claims layered on top of existing control hardware remain comparatively open.
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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.