Chemical & Gas Sensors Patents: Top Companies & Filing Trends 2026
- Filing has cooled from its 2019 peak. 523 records that year against 49 so far in the most recent (partial) year, with the 2021-to-2024 span down 36% from 502 to 323 filings.
- No single assignee dominates. The leader holds 359 records and the top 5 combined account for just 14.6% of all 7,840 records in scope — this is a fragmented field, not a gated one.
- Material analysis carries the bulk of the claim density. G01N covers 43.3% of records, more than four times the next largest class, so most competitive pressure sits in testing and analysis claims rather than in transmission or control.
Filing growth compares 2021 (502 records) with 2024 (323) — 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 7,840 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
This landscape tracks patent families filed against chemical and gas sensor art where the claims also touch signal processing, calibration or measurement error correction — that is, sensors that describe how their own readings are validated, not just how the sensing element is built. The search string pairs sensor-type terms with calibration, threshold and readout language, so the scope leans toward instrumentation and diagnostic claims rather than raw materials chemistry.
Coverage runs from 2015 through the 2026 data cut-off, with 7,840 published records in scope. Because publication trails filing by roughly 18 months, the most recent one to two years understate real filing activity and should be read as provisional.
Let an AI agent run this analysis on your own technology
Pick a task. Every answer cites the patents behind it.
Filing trends and technology composition
Two views of the same 7,840-record dataset: filing volume over time, and where those records sit across IPC subclasses. Together they show a field that grew fast through the late 2010s and has since redistributed rather than collapsed.
Filings rose to a 2019 peak, then pulled back
Annual filings climbed to 523 in 2019, the high point of the series that opened at 438 in 2017. The 2021-to-2024 window — the last stretch fully cleared for publication — fell 36%, from 502 to 323 records; years after 2024 are still filling in and should not be read as a continued decline.
Material analysis and testing dominates the class mix
G01N (material analysis and testing) appears on 43.3% of the 7,840 records, well ahead of A61B diagnosis and surgery at 10.3% and G06F data processing at 8.8%. Digital transmission (H04L, H04B), control systems (G05B) and signalling/alarm (G08B) each sit in the 5-7% range, and A61N electrotherapy rounds out the set at 5.2% — evidence that a meaningful share of this sensor art is written for medical and diagnostic use rather than industrial process monitoring alone.
Shares are the percentage of the 7,840 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Chemical & Gas Sensors Patent Landscape with Eureka
This page is one run against one query. Ask Eureka your own question about chemical & gas sensors patent landscape and every answer comes back with the patent numbers behind it.
Try EurekaMost-cited records and a representative claim
US20150047415A1 — Method and device for monitoring gas sensors
Filed by Robert Bosch, this record describes monitoring gas sensors in an internal combustion engine by high-pass filtering the sensor's output signal during steady-state operation and comparing higher-frequency components against a processed model value. The approach targets electrically oscillating sensors and interference picked up in the evaluation circuit — particularly relevant to exhaust-gas sensors in emissions systems — and is aimed at cutting faulty fault-diagnosis calls.Filed 2015-02-19.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20050115561A1 | Patient monitoring, diagnosis, and/or therapy systems and methods | 1,108 |
| 2 | US20040039298A1 | Noninvasive measurement of chemical substances | 1,101 |
| 3 | US20160188181A1 | User interface system, method, and computer program product | 1,042 |
| 4 | US20190339688A1 | Methods and systems for data collection, learning, and streaming of machine signals for analytics and mainten… | 974 |
| 5 | US20090322510A1 | Securing, monitoring and tracking shipping containers | 916 |
| 6 | US20200348662A1 | Platform for facilitating development of intelligence in an industrial internet of things system | 733 |
| 7 | US20210157312A1 | Intelligent vibration digital twin systems and methods for industrial environments | 716 |
| 8 | US20060079740A1 | Sensors for detecting substances indicative of stroke, ischemia, or myocardial infarction | 683 |
| 9 | US6544193B2 | Noninvasive measurement of chemical substances | 672 |
| 10 | US20180284758A1 | Methods and systems for industrial internet of things data collection for equipment analysis in an upstream o… | 600 |
Citation counts reward older filings that have had more time to accumulate references — read them as a signal of influence on the field, not as a ranking of present-day importance.
Each row carries its publication number; clicking a row searches Eureka by that number.
Put your own technology through the same analysis
Eureka on the web
When you want the answer in the next five minutes.
The agent works the prompt against patents and technical literature, citing every source.
Run your analysis now →MCP server & REST API
When it has to run inside your own pipeline.
Patent search, landscape analysis and assignee resolution as MCP tools. Drop them into any agent framework, or call REST directly.
Browse MCP servers →What the data implies for a filing decision
Four patterns worth acting on rather than just noting.
The rush is over; the field is consolidating claims already staked
Filings dropped from 502 in 2021 to 323 in 2024, after peaking at 523 in 2019. That is a real pullback in a fully-published window, not an artefact of publication lag — new entrants are competing for a smaller annual pool of fresh filings.
No single company has locked up the space
The leading assignee holds 359 records against a total of 7,840, and the top 5 combined reach only 14.6% of all records in scope. Even the tenth-ranked assignee sits at 90 records — this is a long-tail field where a well-drafted claim still has room to stand out.
Material analysis and testing is the crowded lane
G01N alone touches 43.3% of the 7,840 records, more than four times the second-largest class (A61B at 10.3%). Filing here means clearing dense prior art on signal validation and calibration; the classes below 6% — control systems, alarm signalling — carry far less claim traffic per idea.
Filing is US-centred, with Europe and PCT as the clear second tier
The United States receives roughly three times the filings of the next-largest office (EPO at 1,231), with the PCT route at 790 and Australia, Canada and Germany trailing further behind. A freedom-to-operate check that skips non-US offices will still miss a meaningful share of enforceable rights.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to chemical & gas sensors patent landscape, with the prior art for and against each one.
Who is filing, and where the openings sit
The ranked leaders span automotive, medical device and industrial IoT filers rather than a single dominant sensor-house, and recent-year momentum has cooled across the board.
The top filer leads by volume but not by share
At 359 records the leading assignee is the single largest filer, yet that is still a small fraction of the 7,840-record field — enough to set a direction but not enough to close off the art.
Recent-year filing has slowed across nearly every tracked assignee
Several of the more active assignees show year-over-year declines in the latest tracked year, down to zero new filings for some — consistent with the broader 2021–2024 pullback rather than a company-specific retreat.
Collaborative filing is limited and concentrated in medical device pairs
Only 10 co-assignee pairs appear in the dataset, and the strongest links sit around a single medical device filer working with named individual co-inventorsassignees — a pattern typical of implantable and diagnostic sensor programmes rather than broad industry consortia.
| Assignee | Recent year | YoY |
|---|---|---|
| NALU MEDICAL INC | 2 | -33% |
| Strong Force IoT Portfolio 2016 LLC | 1 | -75% |
| Ford Global Technologies LLC | 0 | — |
| SigmaSense LLC | 0 | -100% |
| Medtronic Inc | 0 | — |
| MSA Technology LLC | 0 | -100% |
| Apple Inc | 0 | -100% |
| Honeywell International Inc | 0 | -100% |
Where to take this analysis
The dataset points to specific next questions rather than a single conclusion.
Map the G01N sub-claims before drafting
With 43.3% of records touching material analysis and testing, a new filing needs a clause-level view of what is already claimed in calibration and signal-validation sub-groups, not just a subclass-level check.
Explore the IPC breakdown in EurekaTrack the post-2024 filings as they publish
The 2021-to-2024 decline is real, but 2025 and 2026 are still incomplete on the publication clock. Re-run the trend once those years clear the 18-month lag before concluding the pullback is continuing.
Set a filing alert in EurekaCheck non-US offices for freedom-to-operate
With EPO, PCT, Australia, Canada and Germany all carrying meaningful filing volume alongside the US, a single-jurisdiction clearance search will miss enforceable rights elsewhere.
Run a multi-jurisdiction search in EurekaCommon questions about chemical and gas sensor patents
The dataset in scope contains 7,840 published patent records filed between 2015 and the 2026 data cut-off. Annual filings peaked at 523 in 2019 and the most recently fully-published window, 2021 to 2024, shows a 36% decline from 502 to 323 records. Figures for 2025 and 2026 are still incomplete because publication typically lags filing by around 18 months, so treat the very latest years as provisional rather than a confirmed drop-off.
The field is fragmented: the leading assignee holds 359 records, and the top 5 assignees combined account for only 14.6% of the 7,840 records in scope. The ranked list covers 100 assignees spanning automotive, medical device and industrial IoT sectors rather than a handful of dominant sensor specialists. That spread means a competitive analysis needs to look well past the first few names to get a full picture of freedom-to-operate risk.
Material analysis and testing (IPC class G01N) is the largest single category, appearing on 43.3% of the 7,840 records, reflecting the search scope's focus on sensor readings paired with calibration and error-correction claims. Diagnosis and surgery (A61B) and digital data processing (G06F) follow at 10.3% and 8.8% respectively, with digital transmission, control systems and alarm signalling each in the mid-single digits. Because a single record can carry multiple IPC codes, these shares add up to more than 100% and should be read as overlapping coverage, not a partition of the field.
The classes below the G01N core — control and regulating systems, signalling and alarm systems, and transmission-focused claims — carry substantially less filing density even though they sit structurally adjacent to core sensor-calibration art. Areas such as cross-sensor calibration transfer, drift self-diagnosis and alarm threshold auto-adaptation show up far less often than core material-analysis claims. That gap is a reasonable starting point for a novelty search, though it should be confirmed against the specific claim language already on file before drafting.
US20150047415A1, filed by Robert Bosch in February 2015, describes monitoring gas sensors in an internal combustion engine by high-pass filtering the sensor's output signal during steady-state operation and comparing the higher-frequency components against a processed model value. It is aimed specifically at detecting electrically oscillating sensors and interference in the evaluation circuit for exhaust-gas sensors, reducing false fault-diagnosis calls. Anyone building diagnostic logic for automotive exhaust sensors should check this filing's exact claim scope, since it sits close to a common failure-detection approach in that space.
Research Chemical & Gas Sensors Patent Landscape in depth with Eureka
Go past this page: query the whole chemical & gas sensors patent landscape corpus yourself, in your own scope.
Every answer comes back with patent numbers you can open.
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.