Fire Detection & Suppression Patents: Leaders, Trends 2026
- Filing has cooled since 2019. The peak year was 2019 at 31 filings; by the 2022 midpoint annual volume had already slipped to 26, and the trend since reads flat to declining rather than accelerating.
- A62C dominates the IPC mix. 262 of 336 records sit in A62C (fire-fighting) against 115 in G08B (signalling/alarm), meaning suppression hardware claims outnumber detection-logic claims by more than 2:1.
- The named leaders have gone quiet. Every assignee tracked for recent-year momentum — including the strongest co-filing pair — shows zero filings in the latest year, a pattern worth checking before assuming any one of them still leads.
What this landscape covers
This dataset tracks 336 patent families published between 2015 and 2026 at the intersection of fire detection hardware, suppression delivery and the specific technical fights that drive litigation and licensing in this field: false alarm rejection, clean agent chemistry, sprinkler design, response time and lithium battery fire response. The search deliberately narrows on IPC A62C3, G08B17 and A62C37 so the set reflects system-level claims rather than every incidental mention of fire in a broader safety filing.
Filing activity is concentrated in United States, European and PCT filings, with a meaningful share of India, UK and Canada filings suggesting suppression system makers are pursuing parallel protection in fast-growing construction and infrastructure markets rather than treating the US as the sole gate.
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Filing trend and technology composition
Two views of the same 336 families: how filing volume moved year over year, and which IPC subclasses carry the claim weight.
A peak in 2019, then a plateau
Filings rose to a peak of 31 in 2019, held near a 26-filing midpoint in 2022, and sit at 7 for 2026 — a figure that will revise upward as publication catches up, since publication typically lags filing by around 18 months. Read the shape as flat-to-declining rather than growing.
Suppression hardware outweighs detection logic
A62C (fire-fighting, 262 records) is more than double G08B (signalling & alarm, 115). Smaller pockets in B05B (spraying/atomising, 20), A62B (rescue, 13), B01D (separation/filtration, 13), A62D (chemical protection, 12), G01J (radiation/light measurement, 9) and F23N (combustion control, 8) mark adjacent claim territory that is thin relative to the core.
Shares are the percentage of the 336 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Fire Detection and Suppression Systems with Eureka
This page is one run against one query. Ask Eureka your own question about fire detection and suppression systems and every answer comes back with the patent numbers behind it.
Try EurekaThe pillar patents everyone in this field cites
Clean agent fire suppression system and rapid atomizing nozzle in the same
The filing describes a fixed clean-agent suppression system that stores gas fire suppressant in liquefied form separate from its propellant. On demand, the propellant drives a piston-flow of the liquefied suppressant through a pipe network to atomizing nozzles at the protected area, where a conical flow passage promotes vaporization for faster, more even coverage than a simple flood-discharge design.Filed by KIDDE-FENWAL, INC.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US5153722A | Fire detection system | 155 |
| 2 | US5992532A | Wet pipe fire protection system | 106 |
| 3 | US5945924A | Fire and smoke detection and control system | 105 |
| 4 | US6557374B2 | Tunnel fire suppression system and methods for selective delivery of breathable fire suppressant directly to … | 85 |
| 5 | US5960888A | Engine fire suppression system | 81 |
| 6 | US5511621A | Local flooding fine water spray fire suppression system using recirculation principles | 75 |
| 7 | US20030058114A1 | Fire detection system | 69 |
| 8 | US4507652A | Bidirectional, interactive fire detection system | 64 |
| 9 | US4455487A | Fire detection system with IR and UV ratio detector | 62 |
| 10 | US4470047A | Bidirectional, interactive fire detection system | 60 |
Citation counts are a signal of influence within this searched corpus, not of current commercial relevance — older suppression-system patents accumulate citations simply by being on the books longer.
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 filing strategy
Three patterns stand out once the trend, the IPC mix and the citation table are read together.
The cycle looks past its filing peak
2019's 31 filings is the high point tracked in this corpus, and the 2022 midpoint of 26 already shows the slide underway before the most recent, still-incomplete years. A flat-to-declining trend does not mean the technology is spent — it means new entrants are filing into a claim space that earlier movers already staked out.
Suppression delivery is more contested than detection logic
More than three-quarters of the combined A62C/G08B volume sits in fire-fighting hardware and delivery mechanics rather than alarm and signalling logic. A new detection-side filing — particularly around false alarm rejection — has comparatively more open ground than a new nozzle or piping claim.
The oldest pillar patents still anchor the field
The most-cited records in this set date from the 1990s, and their citation counts reflect decades of accumulation rather than present-day relevance. Treat the citation table as a map of foundational prior art to design around, not a ranking of what matters most today.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to fire detection and suppression systems, with the prior art for and against each one.
Who holds ground — and who has gone quiet
Recent-year momentum data shows every tracked assignee, including the strongest co-filing pair, at zero filings in the latest year. That is consistent with the overall plateau in the trend chart, but it also means no single assignee is currently pulling ahead — the field is open to re-contest.
One detection-sensor pairing dominates co-filing
Of 10 identified co-assignee pairs, one pairing between a fire-safety technology firm and a sensor-technology specialist accounts for 9 shared families — far ahead of the next-strongest pairs at 2-3 families each. That concentration suggests a long-running joint development or supply relationship rather than incidental co-invention.
No assignee is currently pulling ahead
Every named assignee in the recent-momentum tracking — from large industrial suppression manufacturers to smaller specialist filers — shows zero filings in the latest year. Given the roughly 18-month publication lag, some of this is simply filings still working through the pipeline, but the flat pattern across every tracked name is notable.
US leads, but the spread is wide
United States carries the largest share of receiving-office filings, with Europe and WIPO/PCT both in triple digits combined and India, the UK and Canada each drawing a meaningful share. That spread points to suppression system makers protecting infrastructure and construction-driven markets beyond the US, not just defending a home base.
| Assignee | Recent year | YoY |
|---|---|---|
| Tyco Fire Products LP | 0 | -100% |
| Carrier Corporation | 0 | — |
| SLC Technologies, Inc. | 0 | — |
| BF Goodrich Company | 0 | — |
| UTC Fire & Security Americas Corporation, Inc. | 0 | — |
| REACTON FIRE SUPPRESSION LIMITED | 0 | — |
| KOTLIAR IGOR K | 0 | — |
| FIREBIRD SPRINKLER COMPANY | 0 | — |
Where to take this next
The trend and the claim map point to specific next steps depending on whether the goal is freedom-to-operate, licensing or new filing.
Map the clean-agent nozzle prior art before filing
Clean-agent atomizing nozzle design sits on top of decades-old, heavily cited pillar patents. A freedom-to-operate check against the oldest cited records in this set is cheaper than discovering the overlap after a claim is drafted.
Explore clean-agent prior art in EurekaWatch the quiet leaders for reactivation
Zero recent-year filings across every tracked assignee does not mean disengagement — it may mean filings still in the publication pipeline. Tracking these names over the next 18 months will show whether the plateau is real or an artefact of lag.
Set up assignee tracking in EurekaTest the under-claimed detection branches
False-alarm rejection logic and lithium battery fire response sit in thinner IPC territory than suppression hardware. A first claim drafted around either has a clearer run than one competing in the crowded A62C core.
Search white space in EurekaCommon questions on fire detection and suppression patents
This corpus of 336 patent families spans multiple assignees rather than a single dominant holder, and the ranking table on this page shows the actual order by family count. What stands out more than any single leader is that every assignee tracked for recent-year momentum shows zero filings in the latest year, so the current leader by cumulative count is not necessarily the most active filer today. Anyone using this for competitive tracking should pair the cumulative ranking with the recent-momentum data rather than reading either alone.
Filing peaked at 31 in 2019 and had already eased to 26 by the 2022 midpoint, and the shape of the trend since reads flat to declining rather than accelerating. Because patent publication typically lags filing by around 18 months, the most recent one or two years in any such trend will always look lower than they eventually turn out to be. Even accounting for that lag, the multi-year plateau from 2019 onward suggests filing has settled rather than surged.
A62C covers fire-fighting equipment and delivery mechanisms — nozzles, sprinkler systems, suppression agent handling — and accounts for 262 of the 336 records in this dataset. G08B covers signalling and alarm systems, including detection logic and false-alarm handling, and accounts for 115 records. The roughly 2:1 split means suppression hardware claims are more numerous and more contested than detection-logic claims, which has direct implications for where a new filing is likely to face denser prior art.
US20020027143A1, filed by Kidde-Fenwal, Inc., describes a fixed clean-agent suppression system that stores liquefied suppressant separately from its propellant and delivers it through a pipe network to atomizing nozzles with a conical flow passage designed to promote vaporization. It does not block every atomizing nozzle design — it specifically covers the piston-flow delivery architecture and the nozzle-and-deflector-body construction described in its claims. A new nozzle design working around a different flow-passage geometry or a different propellant-separation approach would need its own freedom-to-operate review rather than assuming this single filing clears the space.
The clearest gaps sit in branches adjacent to the dense A62C and G08B core: aspirating smoke detection with stronger false-alarm filtering, lithium battery thermal runaway suppression delivery, and combustion-control feedback loops for early ignition detection all carry far fewer filings than core suppression hardware. Radiation and light-based flame sensing under G01J is also comparatively thin, at 9 records against 262 in A62C. These are not guaranteed-clear areas, but they carry materially less filing density than the crowded nozzle and sprinkler claim space.
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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.