Hall Effect Thruster Patents: Mapping the Field
48.4% concentration. The top 5 assignees hold 30 of all 62 records in scope, but the remaining ranked leaders show a long tail of single- and double-digit filers. Annual filings ran from 8 in 2017 down to a low point before recovering to 3 by 2024, a +200% rise over the 2021-2024 span. 2026 is a partial year and will fill in as publications catch up.
- 1VIRIDIAN SPACE CORP9
- 2CALIFORNIA INST OF TECH9
- 3KELDYSH RES CENT4
- 4AIRBUS DEFENCE & SPACE GMBH4
- 5ASTRIUM SAS4
See the full hall effect thruster technology 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 Hall effect thruster patents
Who holds the most Hall effect thruster patents?
The assignee ranking in this dataset covers 29 companies across 62 records, with a single leader holding 9 records, ahead of the fifth-ranked holder at 4 and the tenth-ranked holder at 2. This is a concentrated-but-contestable field: the top 5 assignees together account for 48.4% of all 62 records, yet no single company dominates the remaining ranked leaders. Aerospace primes, a Russian government research centre and a university research corporation all appear among the leaders, so the field is not limited to one type of organisation.
Is Hall effect thruster patent filing growing or slowing?
Filings peaked in 2017 at 8 and then declined before recovering: from 2021 to 2024, annual filings rose from 1 to 3, a +200% increase over that span. Because patent publication typically lags filing by around 18 months, the 2025 and 2026 figures in any dataset will still be incomplete, so a recent-looking dip should not be read as an actual slowdown. Based on the 2021-2024 trend, the field is in a growth phase rather than a mature or declining one.
What parts of Hall effect thruster design see the most patent activity?
F03H, the plasma and ion propulsion class, appears in 71.0% of the 62 records in scope, and B64G, covering cosmonautics and spacecraft, appears in 64.5%. H05H, plasma and particle accelerators, covers 35.5%. Because a single record can carry multiple IPC classes, these figures add up to more than 100%, and they confirm that patent activity centres on the discharge channel, magnetic shielding and spacecraft integration hardware rather than on control electronics or software.
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 Hall Effect Thruster Technology 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.