Business · Companies · 1 day ago
Former F1 sensor supplier sues replacement over patent
Sentronics has sued Allengra in a Texas federal court over fuel flow meters used in Formula 1.
The British company supplied the FIA exclusively from 2018 to 2025, before German manufacturer Allengra took over the contract for 2026 to 2030.
Sentronics alleges Allengra’s meters infringe its US patent for measuring fuel flow in vehicles.
These meters are fitted to every F1 car and help the FIA enforce fuel-flow limits, which affect engine power.
Sentronics says its testing found that Allengra uses its patented method and is seeking damages and a permanent US ban on making or supplying the meters.
The lawsuit is not expected to affect the United States Grand Prix in Austin because Sentronics has not sought an emergency order to stop their use.
The case will proceed through the court, which has been asked to issue a summons.
Sentronics Holdings has sued its replacement as Formula 1’s fuel flow meter supplier, Allengra GmbH, alleging that Allengra’s sensors infringe a US patent.
The British company filed the case in the US District Court for the Western District of Texas on 16 October.
Sentronics says its laboratory testing found that Allengra’s devices use methods covered by its patent.
It is seeking a permanent ban on supplying the meters in the United States and damages, which it wants tripled because it alleges wilful infringement.
The United States Grand Prix weekend is not expected to be affected because Sentronics has not sought an emergency ban.
- Who
- Sentronics Holdings Ltd sued Allengra GmbH.
- What
- Sentronics alleges that Allengra’s fuel flow meters infringe its US patent. It is seeking a permanent ban and damages.
- When
- Sentronics filed the case on 16 October 2026.
- Where
- The case was filed in the US District Court for the Western District of Texas.
- Why
- Sentronics says Allengra’s sensors use methods covered by its patent for measuring fuel flow.
Sentronics Holdings
Allengra GmbH
Patent infringement
Sentronics Holdings
Sentronics says its laboratory testing found that Allengra’s meters infringe its patent.
Allengra GmbH
Allengra’s US counsel disputed Sentronics’ April 2026 demand letter.
Sentronics was the FIA’s exclusive fuel flow meter supplier.
Allengra won the contract to supply the FIA from 2026 to 2030.
Sentronics notified Allengra about the European counterpart patent, according to the complaint.
Sentronics filed its lawsuit against Allengra in Texas.
- Patent
- US Patent No. 11,391,609
- Patent granted
- July 2022
- Former FIA supplier
- Sentronics, 2018–2025
- Replacement supplier
- Allengra, contract for 2026–2030
- Filing date
- 16 October 2026
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duly noted
Sentronics Holdings Limited (“Sentronics”), files this Complaint for infringement of its United States Patent No. 11,391,609 (“the ‘609 Patent”) in violation of Sections 271(a), (b), and (c) of Title 35 of the United States Code