Fuel Quantity Measurement Systems Patents: Who Leads, Where the Gaps Are 2026
Fuel Quantity Measurement Systems Patents: Capacitance and Ultrasonic Gauging
88.6% of all 35 records sit with just five assignees — this is a field with a dominant core, not an open one. Filings peaked at 6 in 2018 and had fallen to zero by 2024 from 2 in 2021 — a -100% swing over that three-year span. 2025 and 2026 figures are still incomplete because publication typically lags filing by around 18 months, so the apparent drop in the newest years should not be read as the field's current trajectory.
- 1波音公司54.3%
- 2史密斯公共有限公司11.4%
- 3霍尼韦尔国际公司8.6%
- 4史密斯集团有限公司8.6%
- 5西蒙兹精密产品公司5.7%
See the full fuel quantity measurement 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 on this landscape
Who are the leading patent holders in fuel quantity measurement systems for aircraft?
The ranked dataset covers 8 assignees across 35 records, with a single leader holding 19 records — more than half the dataset. The top five combined account for 31 records, or 88.6% of all records in scope, leaving a steep drop to the remaining three assignees. This concentration means most of the core capacitance and ultrasonic gauging claims are already held by a small group of established aerospace suppliers, and any new filing strategy should start by mapping against that leader’s portfolio specifically.
Is the fuel quantity gauging patent field still active, or is it slowing down?
Filing activity peaked at 6 records in 2018 and had fallen to zero by 2024 from 2 filings in 2021, a documented -100% change over that span. However, publication typically lags filing by around 18 months, so 2025 and 2026 figures in this dataset are still incomplete and should not be read as evidence the field has stopped. The honest read is that the last fully observable trend point is 2024, and it shows a sharp decline from the 2018 peak.
What is the difference between capacitance and ultrasonic fuel gauging in the patent record?
Capacitance probes infer fuel level from the dielectric constant of the fuel, while ultrasonic gauging measures fuel density and level acoustically; both approaches appear in the search terms defining this dataset. The IPC composition shows G01F (flow, level and volume measuring) covering 68.6% of the 35 records, indicating that both methods are typically claimed under the same measurement subclass rather than split cleanly by sensing principle. Compensation problems common to both — attitude changes, contamination, water ingress — are what most of the differentiated claims actually protect.
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 Fuel Quantity Measurement 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.