Industrial Valve Patents: Top Companies & Filing Trends 2026
- Filing has cooled since 2022. Annual filings peaked at 151 in 2022 and have declined since, with the partial 2026 count sitting far below the 2017 baseline of 84 — a sign the core claim space is filling in rather than expanding.
- China leads filing venues by a wide margin. China accounts for 851 of the tracked filings, more than the US (545) and EPO (319) combined, reshaping where freedom-to-operate work needs to start.
- Momentum has stalled across nearly every top assignee. Several of the most active historical filers, including Fisher Controls International and Caterpillar, show zero filings in the latest tracked year — a pattern worth checking before assuming any one player still dominates.
What this landscape covers
This dataset tracks patent families addressing industrial valves, control valves and valve actuators where the claims or description engage directly with sealing performance, flow coefficient, cavitation, torque requirement or fugitive emission — the practical performance concerns that separate a working valve design from a theoretical one. The IPC scope centres on F16K valve and tap classifications, with actuation and control logic (F15B, G05D) pulled in as adjacent claim territory.
Coverage runs from 2015 through the 2026 data cut-off. Because publication typically lags filing by around eighteen months, the most recent one to two years of activity in any trend line is understated and will revise upward as later filings publish.
Filing trends and technology composition
Two views of the same 2,423-family dataset: how filing volume has moved year over year, and how those filings distribute across the IPC subclasses that touch valve and actuator design.
A filing curve that has already turned over
Filings rose from 84 in 2017 to a peak of 151 in 2022, then declined through the remaining tracked years to 4 in the partial 2026 count. Read against the 2022 midpoint, the trend is flat-to-declining rather than growing — this is a mature filing space, not an emerging one.
Claims concentrate heavily in core valve mechanics
F16K (valves and taps) accounts for 2,353 of the tracked records, dwarfing the next largest categories — F15B fluid-pressure actuators at 225 and G05D control logic at 211. Smaller but present clusters in F02M fuel supply, F04B pumps, F16L pipe fittings, F01P engine cooling and B01D separation processes show where valve claims spill into adjacent equipment categories.
Shares are the percentage of the 2,423 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Industrial Valve Design and Actuation with Eureka
This page is one run against one query. Ask Eureka your own question about industrial valve design and actuation and every answer comes back with the patent numbers behind it.
Try EurekaThe most-cited prior art in this space
Gas pressurized packing system for control valves (US20160109035A1)
A gas pressurized packing system for use in a control valve, filed by Fisher Controls International. First and second packing members are arranged about lower and upper portions of an operating member extending through a bore in the control valve, with a pressurized gas supply configured to pressurize the bore section between them — disclosed alongside a low fugitive emission control valve and system.Filed 2016-04-21. This is the kind of claim structure worth checking against before designing a new packing or emission-control approach for a control valve stem.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US5573032A | Valve positioner with pressure feedback, dynamic correction and diagnostics | 331 |
| 2 | US8118276B2 | Valve actuators | 207 |
| 3 | US5549137A | Valve positioner with pressure feedback, dynamic correction and diagnostics | 204 |
| 4 | US5630571A | Exhaust flow control valve | 130 |
| 5 | US6244297B1 | Fluid pressure reduction device | 114 |
| 6 | WO2000027658A1 | Suspension control unit and control valve | 103 |
| 7 | US3971411A | Variable resistance type throttling trim | 101 |
| 8 | US5558115A | Valve positioner with pressure feedback, dynamic correction and diagnostics | 96 |
| 9 | US6352106B1 | High-efficiency pumping and distribution system incorporating a self-balancing, modulating control valve | 94 |
| 10 | US3821968A | Control valve structure having double ports | 92 |
Citation counts favour older records simply because they have had longer to accumulate citations inside this corpus — treat them as a signal of influence on later filings, not as a measure of current commercial relevance.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Three findings that change how a freedom-to-operate search or a new-filing strategy in this space should be scoped.
The growth phase is behind this technology, not ahead of it
A peak in 2022 followed by consistent decline through the tracked years indicates the core mechanical and sealing claim space in valves and actuators has already been substantially staked out. New filings now compete against a dense, mature prior-art base rather than an open field.
China is now the primary venue, not a secondary one
With more filings than the US and EPO combined, China has become the venue where the bulk of new valve and actuator claim territory is being defined. Any competitive or freedom-to-operate analysis that stops at US and EPO filings is working from an incomplete map.
Historical leaders are not the current filers
Firms including Fisher Controls International, Caterpillar and KYB show zero filings in the latest tracked year despite strong historical positions. This does not necessarily mean exit from the field — it may reflect publication lag or a shift to trade-secret protection — but it means a ranking built purely on cumulative counts overstates who is currently active.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to industrial valve design and actuation, with the prior art for and against each one.
Who holds the claim territory
Assignee activity in this dataset is concentrated among a small group of valve and actuator specialists and heavy-equipment OEMs, with a long tail of single- or few-filing entrants. Co-assignee filings are rare — only 10 pairs recorded — and cluster around a small number of joint-venture relationships.
Collaboration is the exception, not the norm
The strongest co-filing relationship links Caterpillar with its former Japanese joint-venture partner, Shin Caterpillar Mitsubishi, appearing across several paired filings. Beyond a handful of such pairs, most families in this dataset carry a single assignee.
The most influential prior art predates this decade's filings
The two highest-cited records in the corpus — both titled variations of 'Valve positioner with pressure feedback, dynamic correction and diagnostics' — were filed well before the 2015-2026 window and continue to anchor later actuator-control claims.
Filing strategy already spans six major offices
China, the US, EPO, Japan, the UK and the WIPO PCT route all carry meaningful volume, meaning a serious competitor or licensor in this space is filing across jurisdictions rather than protecting a single home market.
| Assignee | Recent year | YoY |
|---|---|---|
| Fisher Controls International LLC | 0 | -100% |
| Zhejiang Sanhua Automotive Components Co., Ltd. | 0 | — |
| Aisin Seiki Co., Ltd. | 0 | — |
| Caterpillar Inc. | 0 | — |
| KYB Corporation | 0 | — |
| CIRCOR International, Inc. | 0 | — |
| CKD Corporation | 0 | — |
| Kohler Mira Limited | 0 | — |
Where to take this analysis
This landscape gives the shape of the field. Turning it into a filing or freedom-to-operate decision means going deeper on the specific claims that matter to your design.
Check claim scope on the highest-citation records
The valve positioner and actuator patents anchoring this corpus have broad citation influence — confirm exactly what their claims cover before assuming a new control or diagnostic feature is clear to file.
Run a claim comparison in EurekaMap the China filing surge in detail
With 851 filings, China now carries more volume than the US and EPO combined. A venue-specific breakdown will show which assignees are driving that volume and where their claims sit relative to your design.
Explore China filings in EurekaTrack assignees whose momentum has gone quiet
Zero-filing years for previously active assignees can mean genuine exit, a shift to trade secret, or simple publication lag. Verifying which applies changes how much weight to give their existing portfolio.
Monitor assignee activity in EurekaCommon questions about industrial valve patents
Filing activity in this dataset is concentrated among a small group of valve specialists and heavy-equipment OEMs, including Fisher Controls International, Caterpillar, KYB and Aisin Seiki, alongside component specialists like CIRCOR. However, several of these historically dominant filers show zero filings in the most recent tracked year, so cumulative counts alone can overstate who is currently the most active filer. A useful check is to compare cumulative family counts against recent-year momentum before treating any single assignee as the current leader.
No — filing volume peaked in 2022 at 151 families and has declined in every year since, with the partial 2026 count sitting well below even the 2017 baseline of 84. Combined with the fact that F16K core valve mechanics account for the large majority of filings, this points to a mature, well-occupied claim space rather than an expanding one. New entrants should expect to compete against dense prior art in core sealing and actuation mechanics rather than filing into open territory.
China is the largest single receiving office in this dataset at 851 filings, ahead of the US at 545 and the EPO at 319. This reflects both the concentration of valve and equipment manufacturing in China and a broader pattern of domestic filing volume growth across mechanical and industrial equipment categories generally. Anyone conducting freedom-to-operate analysis in this field should treat Chinese filings as a primary rather than secondary search jurisdiction.
US20160109035A1, filed by Fisher Controls International, discloses a gas pressurized packing system for control valves that uses first and second packing members around an operating member's bore, with pressurized gas supplied between them to reduce fugitive emissions. It also discloses a related low fugitive emission control valve and system built around that packing arrangement. Anyone designing a new stem-sealing or emission-control mechanism for a control valve should review its specific claim boundaries rather than assume the general concept of gas-assisted packing is open to use freely.
The dense filing activity sits in core F16K valve mechanics, but narrower performance-tuning branches remain comparatively under-claimed, including cavitation-resistant trim geometry tuned for high flow coefficient, torque-feedback diagnostics integrated directly into actuator control loops, and low-emission packing solutions adapted for engine-cooling-circuit valves where F16K claims overlap with F01P. These are narrower filing opportunities rather than open fields, and each should be checked against the specific prior art cited in adjacent categories before drafting claims.
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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.