Engine Bleed Air Systems Patents: Who Leads, Where Gaps Are 2026
Engine Bleed Air System Patents: Concentration, Trends and Open Claim Space
Top 5 filers hold 53.4% of all 826 records. and the top 10 hold 74.1% — this is a field with a short list of gatekeepers, not a fragmented one. Filings hit their high point in 2017 at 111 records, then declined before recovering into growth: 2021-to-2024 volume rose 16%, from 19 to 22 in-scope records. 2025 and 2026 figures will continue to rise as later publications land — read them as provisional, not as a trend reversal.
- 1THE BOEING CO122
- 2HONEYWELL INTERNATIONAL INC118
- 3HAMILTON SUNDSTRAND CORP111
- 4GE AVIATION SYSTEMS LLC46
- 5GENERAL ELECTRIC CO44
See the full engine bleed air systems 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 about engine bleed air system patents
Who holds the most patents on engine bleed air systems?
The dataset ranks 826 records across 100 assignees, and the leading filer holds 122 records, well ahead of the fifth-ranked assignee at 44. The top 5 assignees combined hold 53.4% of all 826 records, and the top 10 hold 74.1%, so this is a field concentrated among a small group of large aerospace systems and airframe suppliers rather than spread evenly across many filers. Anyone assessing freedom to operate should treat that leading group as the primary reference set.
Is the engine bleed air patent field still active, or has filing slowed down?
Filing peaked in 2017 at 111 records and has since settled into a lower plateau, but the most reliable recent read shows growth: 2021-to-2024 filings rose 16%, from 19 to 22 records. Because publication typically lags actual filing by around 18 months, the 2025 and 2026 figures in any trend chart are still incomplete and should not be read as evidence of a slowdown. The field should be treated as active based on the last complete year, 2024.
What technology areas do engine bleed air patents actually cover?
The largest share, 63.0% of the 826 records, falls under B64D aircraft equipment, and 40.7% falls under F02C gas-turbine plants, reflecting that most claims sit at the interface between the turbine and the airframe’s pneumatic and environmental control systems. Smaller but active bands include F16K valves and taps (6.1%), F02K jet propulsion (5.3%), B64C airframes (4.8%), F04D pumps (4.2%) and F25B refrigeration (4.0%). Because a record can carry multiple IPC codes, these shares add up to more than 100% and should be read as coverage density, not as mutually exclusive categories.
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 Bleed Air Systems 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.