Cabin air quality and filtration patents: mapping the filing landscape
Concentrated at the top. the five most active assignees hold 51.4% of all 280 records in scope, and the leading ten hold 65.7% — filing here is far from an open field. Annual filings rose to a peak of 29 in 2022, then held flat at 20 in both 2021 and 2024 — a 0% three-year change. The tail into 2025-2026 reflects publication lag rather than a real slowdown.
- 1GORE ENTERPRISE HOLDINGS INC35
- 2HOLLINGSWORTH & VOSE COMPANY31
- 3MANN HUMMEL GMBH31
- 4HONEYWELL INTERNATIONAL INC27
- 5PALL CORP20
See the full cabin air quality and filtration analysis in Eureka
- The complete ranking, not just the top five
- Every IPC branch with its share of the corpus
- The most-cited records, and where claim space is still thin
Common questions on cabin air quality patents
Who are the leading patent holders in cabin air filtration?
The dataset ranks 77 companies by record count, with a single leader holding 35 records against 20 at fifth place and 7 at tenth. The top five assignees together account for 51.4% of all 280 records in scope, and the top ten account for 65.7%, so filing activity is concentrated in a small leading group rather than spread evenly. This concentration matters for freedom-to-operate work: a new filer's most likely blocking prior art sits with that leading group, not the long tail of single-filing entrants.
Is patent filing in cabin air quality technology growing or slowing?
Annual filings peaked at 29 in 2022 and had returned to 20 by 2024, the same level as 2021 — a flat, 0% three-year change rather than clear growth or decline. Counts for 2025 and 2026 appear lower in the raw data, but publication typically lags filing by around 18 months, so those years are still filling in and should not be read as a slowdown. The safest read is a plateau at a filing level the field has sustained since at least 2021.
What technology areas dominate cabin air quality patents?
Filtration hardware dominates: B01D separation processes appear in 57.9% of the 280 records in scope, more than double the next largest class. Vehicle heating and air conditioning (B60H, 20.4%) and aircraft equipment (B64D, 17.1%) form a second tier, with sensing and data-processing classes such as G01N and G06F present but comparatively thin. Because a single record can carry multiple IPC codes, these shares sum to more than 100% and should be read as coverage, not a partition of the field.
Disclaimer. This analysis is based on Patsnap Eureka data drawn from a limited snapshot of global patent records and is provided for general information and reference only. Patent data carries inherent limitations — recent filings are under-counted because of publication lag, counts may be on a record or family basis, classification and applicant-name data may contain errors or duplicates, and the underlying search query defines the scope shown — so the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
Nothing here is an exhaustive prior-art, novelty, freedom-to-operate or validity search, nor does it constitute legal, financial or professional advice, and it should not be relied upon as such. Verify independently and review with qualified patent and legal professionals before acting on it.
Method: Filing trend and technology composition. Derived from a Patsnap search on Cabin Air Quality and Filtration covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish. Every share divides by all records in scope. Data: Patsnap Eureka. See the full landscape report.