Valves & Flow Control Patents: Leaders, Trends & White Space 2026
- No single filer dominates. the ranked leader holds 2,103 records and the top 5 combined account for just 6.7% of the 129,992 records in scope.
- Filing has cooled from its peak. 2017 was the high-water mark at 713 filings, and 2021-to-2024 volume fell 38% (642 to 400), though 2025-26 figures are still filling in under publication lag.
- Valve and control-system classes lead but stay thin. F16K (valves & taps) tops the IPC breakdown at just 2.7% of records, meaning claim space is spread thin rather than locked down.
Filing growth compares 2021 (642 records) with 2024 (400) — 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 129,992 records in scope (CR5), not by the ranked leaders only.
What the valves & flow control patent record shows
Flow control valves sit at the intersection of fluid mechanics, drug delivery, industrial process control and drilling equipment, which is why this dataset spans 129,992 published records filed under claims referencing flow rate, pressure ratio, rotor speed, seal clearance, flow passage and shaft seal alongside a flow or fluid valve limitation. That breadth is itself informative: no single application domain — medical infusion, hydraulic actuation, wellbore control, semiconductor gas delivery — owns the term. Flow control valve is a mechanism claimed across industries, not a market with one dominant use case.
The filing trend peaked in 2017 and has since eased, and the assignee ranking is broad rather than concentrated: the leading company holds a low single-digit share of the total record count and the next tier of filers each carry only a few hundred to a couple thousand records. Reading this as a fragmented, still-active field with room for differentiated claims is more accurate than reading it as either saturated or declining.
Filing trend and technology composition
Volume, receiving offices and IPC classes for the 129,992 records in scope, drawn directly from the underlying dataset.
Filing trend: a 2017 peak, then a step down
Annual filings ran at 713 in 2017, the highest point in the series, before easing through the early 2020s. The clearest complete-year comparison available is 2021 to 2024, where filings fell from 642 to 400 — a 38% drop. Counts for 2025 and 2026 are still low because publication trails filing by roughly 18 months; they should not yet be read as a continued decline.
IPC composition: spread across mechanical, control and medical classes
F16K (valves & taps) leads at 2.7% of all records, followed by G05D (control of non-electric variables) at 1.6% and F15B (fluid-pressure actuators) at 1.1%. A61M (body-fluid devices), E21B (drilling), B01D (separation), G01F (flow measurement) and F02M (fuel supply) each sit at or below 1%. Because records can carry multiple IPC classes, these shares do not sum to 100% — they show how thinly the subject matter is spread across adjacent mechanical and control disciplines rather than concentrated in one class.
Shares are the percentage of the 129,992 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Valves & Flow Control Patent Landscape with Eureka
This page is one run against one query. Ask Eureka your own question about valves & flow control patent landscape and every answer comes back with the patent numbers behind it.
Try EurekaRepresentative and most-cited filings
US20120049097A1 — Flow control valve
A linear-type flow control valve using a spool valve element fitted in a valve housing, with a damper chamber and a restricting section that varies the flowing cross-sectional area of working fluid depending on whether the spool sits on the positive or negative side of a neutral output-flow point.Filed by Toyota Jidosha Kabushiki Kaisha, published 2012-03-01.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US6589229B1 | Wearable, self-contained drug infusion device | 2,296 |
| 2 | US20050033278A1 | Fluid assisted medical devices, fluid delivery systems and controllers for such devices, and methods | 889 |
| 3 | US4436674A | Vapor mass flow control system | 801 |
| 4 | US6162323A | Plasma processing apparatus | 776 |
| 5 | US5865205A | Dynamic gas flow controller | 755 |
| 6 | US5147355A | Cryoablation catheter and method of performing cryoablation | 746 |
| 7 | US6119710A | Method for wide range gas flow system with real time flow measurement and correction | 706 |
| 8 | US20020161394A1 | Aortic filter catheter | 686 |
| 9 | US4393013A | Vapor mass flow control system | 677 |
| 10 | US5938634A | Peritoneal dialysis system with variable pressure drive | 669 |
Citation counts reflect an older-record bias inherent to any searched corpus; treat them as a measure of influence on later filings, not of current commercial relevance.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Browse MCP servers →What the concentration and citation data tell a filing strategy
Three patterns in the ranking and citation data matter more than the raw totals for anyone deciding where to file or challenge.
The top of the ranking is thin, not dominant
The leading assignee holds 2,103 records and the fifth-ranked holds 1,450; combined, the top five account for only 6.7% of all records in scope, and the top ten for 11.0%. That is a wide field with no single gatekeeper controlling the core valve mechanism.
Citation leaders skew toward older medical-device claims
The most-cited record in the set is a wearable, self-contained drug infusion device, followed by fluid-delivery controller and gas-flow-controller filings from the 1980s-90s. High citation counts here mark foundational mechanisms other filers had to design around, not current state of the art.
Large legacy filers have gone quiet in the most recent year
Several long-standing assignees show zero filings in the latest tracked year, with year-on-year drops of -100% for some. Given the roughly 18-month publication lag, this reads as a reporting gap for 2025-26 rather than confirmed withdrawal from the space.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to valves & flow control patent landscape, with the prior art for and against each one.
A broad, fragmented assignee base
The 100-company ranking returned by the dataset covers industrial conglomerates, automotive OEMs, oilfield services and medical-device makers rather than a small set of specialists — a sign that flow control claims cut across sectors more than they define one.
No single company controls the mechanism
The top-ranked assignee's 2,103 records represent a small fraction of the 129,992-record total, and the gap down to fifth place (1,450) and tenth place (881) is gradual rather than steep.
Automotive, oilfield and medical filers compete on the same terms
Automotive manufacturers, heavy-machinery and turbine makers, oilfield-services groups and medical-device companies all appear among the ranked assignees, each claiming flow-control mechanisms for a different end application.
Co-filing clusters mostly reflect corporate family structure
The strongest co-assignee pairs in the dataset link related entities within the same corporate group filing jointly across jurisdictions, rather than independent companies partnering on shared technology.
| Assignee | Recent year | YoY |
|---|---|---|
| Hitachi Construction Machinery Co., Ltd. | 0 | — |
| Mitsubishi Electric Corporation | 0 | — |
| Fisher Controls International LLC | 0 | — |
| Toyota Motor Corporation | 0 | -100% |
| General Electric Company | 0 | -100% |
| Mitsubishi Heavy Industries, Ltd. | 0 | -100% |
| Honeywell International Inc. | 0 | -100% |
| Eaton Corporation | 0 | — |
Where to take this next
The dataset points to a fragmented but still-active field. Turning that into a filing or freedom-to-operate decision means going deeper on the specific mechanism you are working on.
Check freedom-to-operate against the representative filing
Any linear-type spool valve with damper-chamber flow restriction should be checked against US20120049097A1 and its family before finalising claim scope.
Run a clearance search in EurekaTrack momentum among quiet legacy filers
Several large assignees show zero recent-year filings; confirm whether that reflects publication lag or an actual shift before assuming reduced competitive pressure.
Set up assignee monitoring in EurekaProbe the under-claimed sub-areas
Seal-clearance compensation and rotor-speed-linked throttling show lighter filing density relative to core valve classes — worth a targeted prior-art check before drafting.
Explore white space in EurekaCommon questions on the valves & flow control patent landscape
The ranked leader in this dataset holds 2,103 records out of 129,992 in scope, with the fifth-place assignee at 1,450 and tenth place at 881. The top five combined account for only 6.7% of all records, and the top ten for 11.0%, so the field is broad rather than dominated by one company. Filers span automotive OEMs, industrial conglomerates, oilfield-services groups and medical-device makers, reflecting how many industries claim flow-control mechanisms independently.
Filings peaked in 2017 at 713 for the year and have eased since. Comparing the last two complete years available, 2021 to 2024, filings dropped from 642 to 400, a 38% decline. Figures for 2025 and 2026 look lower still, but that reflects publication typically lagging filing by around 18 months rather than a confirmed further drop, so recent years should not yet be read as a continued decline.
F16K, covering valves and taps, is the leading class at 2.7% of all 129,992 records, followed by G05D for control of non-electric variables at 1.6% and F15B for fluid-pressure actuators at 1.1%. Related classes include A61M for body-fluid devices, E21B for well drilling, B01D for separation processes, G01F for flow measurement and F02M for fuel supply, each near or under 1%. Because a single record can carry several IPC classes, these percentages overlap rather than sum to 100%, showing the subject matter spread across mechanical, control and application-specific disciplines.
Sub-areas tied to seal-clearance compensation, rotor-speed-linked throttling and pressure-ratio-adaptive spool geometry show comparatively light filing density relative to the breadth of industries using flow-control mechanisms. This does not mean the underlying physics is unclaimed everywhere, but that claim density in these specific combinations is lower than in the core valve and control classes. A targeted prior-art search on the specific mechanism, rather than the general category, is the practical way to confirm an opening before drafting.
Citation counts in this dataset are led by older records, including a wearable drug-infusion device patent cited 2,296 times and a vapor mass flow control system from the 1980s cited 801 times. Older patents accumulate citations simply by being available longer, so high counts mark historically foundational mechanisms rather than currently dominant technology. They are useful for identifying claims that shaped later filings, but should be weighed against recent filing activity, not used alone to judge present-day competitive importance.
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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.