Aero Engine Bearings Patents: Top Companies & Filing Trends 2026
Aero Engine Bearing and Bearing Chamber Patents
58.2% concentration. The top 5 of 32 ranked assignees hold 92 of the 158 records in scope, a field led by one company with 21 filings. Filings rose from 4 in 2017 to a peak of 32 in 2019, then eased. The 2021-to-2024 span shows a 43% decline (7 to 4), a genuine slowdown in a corpus where 2024 is the last year that can be treated as complete; 2025 and 2026 figures will rise as later publications land.
- 1RTX CORP21
- 2SAINT AUGUSTIN CANADA ELECTRIC20
- 3ROLLS ROYCE PLC20
- 4GENERAL ELECTRIC CO16
- 5ROLLS ROYCE CORP15
See the full aero engine bearings and bearing chambers 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 this landscape
Who holds the most patents on aero engine bearings and bearing chambers?
In this 158-record dataset, one assignee leads with 21 records, and the top 5 of 32 ranked assignees together hold 92 records, or 58.2% of everything in scope. The drop-off is steep: fifth place sits at 15 records while tenth place is down to 4. This means freedom-to-operate work in this space should prioritise checking the leading handful of companies first, since they control the majority of claim territory.
Is patent filing activity in aero engine bearings growing or slowing?
Filings peaked at 32 in 2019 and have since declined, with the 2021-to-2024 window showing a 43% drop from 7 to 4 filings. 2024 is the most recent year in this corpus that can be treated as complete, because publication typically lags filing by around 18 months. Readers should not treat the lower 2025-26 counts as confirmation of a further decline, since those years are still filling in.
What patent classes cover squeeze film dampers and bearing chambers?
The dominant classes are F01D (turbines and non-positive-displacement engines) at 50.6% of the 158 records, F16C (shafts, bearings and couplings) at 29.1%, and F02C (gas-turbine plants) at 27.8%. Because a single filing often carries several classes, a bearing-chamber patent is commonly also tagged under broader turbine-architecture classes rather than filed as a standalone mechanical component claim. F16J seals and gaskets, at 22.2%, also appear frequently alongside these.
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 Aero Engine Bearings and Bearing Chambers 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.