Sentronics Files Patent Infringement Lawsuit Against Allengra Over F1 Fuel Flow Meters

Sentronics Holdings Ltd has filed a federal lawsuit in the Western District of Texas against Allengra GmbH, alleging patent infringement regarding the fuel flow meters used across the Formula 1 grid. The dispute centers on a specific design utilizing phase-modulated ultrasonic signals to measure fluid paths, a technology Sentronics claims is the foundation of its intellectual property.

Why it matters:

Fuel flow regulation is one of the most critical technical constraints in modern F1. A legal challenge against the official supplier not only threatens Allengra's financial standing but also raises questions about the procurement process for the 2026-2030 cycle. While the lawsuit is unlikely to disrupt immediate race operations, the allegation of "willful" infringement suggests a calculated move to dominate the market using misappropriated technology.

The Details:

• The Patent: Sentronics holds Patent No. 11,391.609, applied for in 2017 and issued in July 2022, covering the specific ultrasonic signal method.
• The Conflict: Allengra released its own meter in July 2022 and subsequently won the FIA tender to be the exclusive supplier for the 2026-2030 period.
• The Evidence: Sentronics claims that internal lab testing conducted in 2024 proved Allengra's system uses the patented design. They further allege that Allengra was formally notified of the infringement in August 2025 but continued its operations.
• Market Leverage: The filing asserts that Allengra used the prestige of the F1 contract to secure additional business and relationships in other key global markets.

What's next:

Sentronics is seeking financial compensation for lost profits dating back to the patent's issuance in 2022 and has demanded a trial by jury. Crucially, the company is not seeking an emergency restraining order to stop the use of the meters at this weekend's United States Grand Prix, meaning the event in Austin will proceed unaffected. However, a prolonged legal battle could cast a shadow over Allengra's tenure as the sport's exclusive supplier through 2030.