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ARTICLE · 06 FEBRUARY 2026

D. Mass. Patent Litigation Update: December 2025

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In Metrom Rail, LLC v. Massachusetts Bay Transportation Authority, et al., No. 25-cv-11446-ADB Judge Burroughs (i) granted defendant Piper Networks Inc.'s motion to dismiss...

United StatesIntellectual Property
Matthew C. Berntsen
Matthew C. Berntsen
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This is part of a series of articles discussing recent orders of interest issued in patent cases by the United States District Court for the District of Massachusetts.

In Metrom Rail, LLC v. Massachusetts Bay Transportation Authority, et al., No. 25-cv-11446-ADB Judge Burroughs (i) granted defendant Piper Networks Inc.'s motion to dismiss or transfer, (ii) granted the Massachusetts Bay Transportation Authority (“MBTA”)'s motion to sever and stay, and (iii) denied without prejudice (a) Plaintiff motions for preliminary injunction and related expedited discovery and (b) the MBTA's motion to dismiss.

According to the complaint, Plaintiff sells and holds patents on train collision avoidance systems. Together with a third-party integrator, Piper lost a bid to the MBTA to provide collision avoidance systems for the Green Line trolley system, which project was later cancelled as the winning bigger was unable to deliver. Piper subsequently hired multiple individuals who

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