Engine Nacelle Patents: Who Leads, Where the Gaps Are 2026
Engine Nacelle and Inlet Design Patents: Concentration, Trend and Where the Claims Thin Out
78.1% concentration. The top five assignees hold 211 of the 270 records in scope, leaving a long tail of single- and few-filing entrants. Filings peaked at 25 in 2017. By 2021 they had settled to 21, and by 2024 — the most recent year that can be read as complete once publication lag is accounted for — to 7, a -67% span. Years after 2024 will fill in as later publications land and should not yet be read as a further drop.
- 1THE BOEING CO117
- 2ROHR INC61
- 3ROSEMOUNT AEROSPACE INC15
- 4SHORT BROTHERS PLC9
- 5UNITED TECH CORP9
See the full engine nacelle and inlet design 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
Questions practitioners ask about this landscape
Who holds the most patents in engine nacelle and inlet design?
One assignee leads the ranked group with 117 of the 270 records in scope, well ahead of the fifth-place assignee at 9 and the tenth-place assignee at 6. The top five assignees combined hold 211 records, or 78.1% of everything in scope, and the top ten hold 246, or 91.1%. That leaves a long tail of smaller filers spread across the remaining 29 ranked companies, most holding only a handful of records each.
Is filing activity in engine nacelle and inlet design growing or slowing?
Filings peaked at 25 records in 2017 and had fallen to 7 by 2024, a -67% change over that three-year span. Because publication lags filing by roughly 18 months, the years closest to the 2026 cut-off will still fill in and should not be read as evidence of a further decline. Several of the largest historical assignees show no published output in the most recent tracked year, which is consistent with lag rather than a confirmed exit from the field.
What does US20050006529A1 actually cover and why does it matter?
US20050006529A1, assigned to Rohr Inc., covers an aircraft engine nacelle that combines a noise-abatement structure such as an acoustic panel on the internal skin surface with an electrically powered de-icing system on the external skin surface. It is one of the most-cited records in this dataset, with a related family member cited 141 times, because it defines a combined noise-and-ice-protection architecture that many later inlet-lip filings needed to reference or design around. Anyone filing new inlet-lip claims that pair acoustic treatment with de-icing on the same skin structure should read this family closely before drafting.
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 Engine Nacelle and Inlet Design 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.