Respirator Fit and Face Seal Patents: Who Leads 2026
- One leader holds 16 of 86 records, and the top 5 assignees combined account for 69.8% of all records in scope — concentration is heavy at the very top.
- Filing peaked in 2019 at 11 records, and the tracked leaders' 2021→2024 filing count fell 40%, from 5 to 3 — momentum has cooled among the most active filers.
- Image and data-recognition classes (G06T, G06K) touch roughly a fifth of records, signalling that fit verification is shifting from mechanical seal design toward sensor- and vision-based fit testing.
Filing growth compares 2021 (5 records) with 2024 (3) — 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 86 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
Respirator fit and face seal patents cover the mechanical and procedural problem of getting a respirator to seal against an individual face — sealing edge geometry, strap tension, facial anthropometry, beard interference, donning training — and the testing methods used to verify that seal, including fit factor measurement and quantitative fit testing. The search scope pulls together documents that name both a fit-testing or face-seal-leakage concept and one of the specific mechanisms behind it, which keeps the set focused on seal performance rather than filtration media chemistry or general mask construction.
The 86 records in scope span 2015 through the 2026 cut-off, filed out of the United States, WIPO, Europe, Canada, Australia and Austria. Because publication trails filing by around 18 months, the most recent one to two years understate actual filing activity and should be read as provisional rather than a real decline.
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Filing trend and technology composition
Two views of the same 86-record set: how filing activity has moved year over year, and which IPC subclasses the records fall into. Because a single record can carry several classes, the composition shares sum to more than 100% of the record total.
Filing trend, 2015–2026
Activity peaked in 2019 at 11 records. Among the tracked leaders, the filing count fell from 5 in 2021 to 3 in 2024, a 40% drop over that three-year span — the last span for which the data can be treated as complete given publication lag.
Technology composition by IPC subclass
A62B (rescue and life-saving equipment) dominates at 86.0% of records, with A41D (outerwear and garments) a distant second at 27.9%. Image processing (G06T, 12.8%) and data recognition (G06K, 9.3%) show a meaningful secondary cluster around automated fit verification, sitting alongside smaller shares in test-rig and materials-analysis classes (G01M, G01N, G06F).
Shares are the percentage of the 86 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Respirator Fit and Face Seal with Eureka
This page is one run against one query. Ask Eureka your own question about respirator fit and face seal and every answer comes back with the patent numbers behind it.
Try EurekaMost-cited records and a representative recent filing
US12023529B1 — Virtual operator for respirator fit testing
A system, method, and computer program product for performing a respirator fit test: instructing a user to select and don a respirator and connect tubing to a fit-testing device, prompting and performing the fit test, detecting a signal at a processor, analyzing the fit-test data, troubleshooting a failing fit factor, and displaying results to the user.Filed by OHD, LLLP, published 2024-07-02 — illustrates the shift toward software-guided, self-administered fit testing.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20080110469A1 | Strapless flexible tribo-charged respiratory facial mask and method | 230 |
| 2 | US4846166A | Non-invasive quantitative method for fit testing respirators and corresponding respirator apparatus | 113 |
| 3 | US20090277451A1 | Strapless cantilevered respiratory mask sealable to a user's face and method | 68 |
| 4 | US20110315144A1 | Respirator that has inward nose region fold with high level conformation | 56 |
| 5 | US20110061656A1 | Face Mask With Seal Within Seal And Optional Bridging Seal | 45 |
| 6 | US8011368B2 | Respirator fit-testing apparatus and method | 31 |
| 7 | US20060048783A1 | Personal mask test system | 28 |
| 8 | WO1987002898A1 | A non-invasive, quantitative method for fit testing respirators and corresponding respirator apparatus | 28 |
| 9 | US8381727B2 | Face mask with seal within seal and optional bridging seal | 27 |
| 10 | US20150040910A1 | Face mask seal for use with respirator devices and surgical facemasks, having an anatomically defined geometr… | 22 |
Citation counts reflect influence within the searched corpus and favour older filings; they are not a measure of current commercial importance.
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Three patterns stand out once concentration, technology mix and citation history are read together: heavy top-end consolidation, a growing software layer on top of mechanical seal design, and an older core of foundational patents that still anchors the field.
The field is led by one dominant filer
The leading assignee holds 16 of the 86 records in scope, and the top 5 combined account for 69.8% of all records. That is a steep drop-off from the leader to the rest of the ranked field, which runs to 32 companies in total.
Activity among top filers has cooled, not the whole field
The filing count among the most active assignees fell from 5 in 2021 to 3 in 2024. Because 2025 and 2026 publications are still arriving, this should be read as a genuine slowdown among leaders through the last complete year, not evidence that the field itself is winding down.
Sensor and vision-based fit verification is emerging
A62B mechanical seal and rescue-equipment claims still dominate at 86.0% of records, but G06T and G06K together indicate that a meaningful slice of recent activity is aimed at automating fit-factor detection and analysis rather than redesigning the seal itself.
Foundational strapless-mask patents still anchor the field
The most-cited record in this set, a strapless flexible tribo-charged facial mask filing, carries far more citations than any other document here. High citation counts in an older record reflect influence accumulated over time, not present-day relevance, but they mark where downstream claim drafting has historically had to work around.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to respirator fit and face seal, with the prior art for and against each one.
Assignee concentration and collaboration patterns
The ranked field runs to 32 companies, but activity is not evenly spread. A small cluster of academic and corporate filers accounts for most of the volume, while co-assignee pairs point to a handful of durable research partnerships.
One filer sets the pace
The top-ranked assignee's 16 records put it well ahead of fifth place, which sits at 6 records, and tenth place at 3. That gap suggests a single filer has built a durable claim position rather than the field being an even contest.
A long tail of single- and few-filing entrants
Beyond the top 10 — which together hold 90.7% of the 86 records — the remaining assignees in the ranking each contribute a small number of filings, typical of a field where academic labs and small device makers file opportunistically alongside a few sustained corporate programmes.
University-hospital partnerships cluster together
The strongest co-assignee pairs link a university with affiliated hospital and health-service bodies, each appearing together three times. That pattern points to clinical fit-testing research being filed jointly rather than by either party alone.
| Assignee | Recent year | YoY |
|---|---|---|
| 3M Innovative Properties Co. | 0 | -100% |
| THE GMN GRP LLC | 0 | — |
| MATICH RONALD D | 0 | — |
| KOEHLER RICHARD H | 0 | — |
| University of Cincinnati | 0 | -100% |
| CRUTCHFIELD CELEVATORON D | 0 | — |
| MSP Corp | 0 | — |
| Griffith University | 0 | — |
Where to take this analysis
The dataset points to a field with a concentrated top and a growing software layer. Two directions follow naturally from that.
Track the vision-and-sensor claim cluster
G06T and G06K classes already touch over a fifth of records between them. Watch whether software-guided fit testing, like the virtual-operator approach in the representative filing, consolidates around a few players or stays fragmented.
Explore this cluster in EurekaTest the under-claimed sub-areas for freedom to operate
Beard-interference compensation and anthropometry-adaptive strapping show thin filing density relative to the core seal claims. Before committing engineering time, run a focused prior-art check on these specific mechanisms.
Run a white-space check in EurekaCommon questions on respirator fit and face seal patents
The leading assignee in this dataset holds 16 of the 86 records in scope, well ahead of the rest of the ranked field, which runs to 32 companies. The top 5 assignees combined account for 69.8% of all records, and the top 10 account for 90.7%. That concentration means most of the claim space around fit testing and seal design is already occupied by a small number of filers, with a long tail contributing only a handful of records each.
Fit factor is a quantitative measure of how well a respirator seals against a wearer's face, typically derived by comparing particle concentration outside and inside the mask during a fit test. It appears throughout this landscape because it is the standard metric that quantitative fit-testing methods and devices are built to measure or improve. Patents referencing fit factor usually cover either the measurement method itself or a mechanical seal design intended to raise the achievable fit factor for a given face shape.
Filing peaked in 2019 at 11 records in this dataset, and among the most active filers the count fell from 5 in 2021 to 3 in 2024, a 40% decline over that span. However, publication of a patent typically lags its filing date by roughly 18 months, so figures for 2025 and 2026 are still incomplete and should not be read as a real drop-off. The 2021-to-2024 window is the most recent period that can be treated as reasonably complete.
The dominant class is A62B, covering rescue and life-saving equipment, which touches 86.0% of the 86 records in scope. A41D (outerwear and garments) is the next largest at 27.9%, reflecting mask-as-garment construction claims. A smaller but notable cluster sits in image processing (G06T, 12.8%) and data recognition (G06K, 9.3%), pointing to camera- or sensor-based fit verification as an emerging overlay on top of mechanical seal design.
Relative to the dense core of mechanical seal and rescue-equipment claims, a few specific mechanisms show thinner filing density: beard-interference compensation, automated feedback for donning training, vision-based fit-factor scoring, and anthropometry-adaptive strap tensioning. These sit at the edges of the current claim map rather than in classes with no activity at all, so a freedom-to-operate check focused on the specific mechanism — not just the broad IPC class — is the practical way to confirm how open any one of them really is.
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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.