VPG Systems UK Ltd v Air-Weigh Europe Ltd
Decision date: 1 July 2015
Neutral citation: [2015] EWHC 1862 (IPEC)
Overall AI summary confidence: high
Short overview
This short overview is intended to summarise the case, issues and outcome so far as they are supported by the judgment.
AI confidence in this short overview: high
This patent case concerned EP(UK) 2,099,626 B1 claiming an on-board weighing system using an inclinometer/accelerometer mounted on a single suspension component to indicate vehicle loading. The court construed "suspension component" purposively to include non‑chassis/body/drive‑train parts that change angle under load (including a non‑rotating hub part) and held that Rothoff disclosed substantially the same idea, so claims 1 and 7 lacked inventive step and were invalid. AEL had admitted infringement if the patent were valid, so invalidity disposed of VPG's claim on those claims.
Ratio decidendi
This summary is intended to identify the ratio decidendi, meaning the legal reasons for deciding and the binding part of the decision.
AI confidence in this ratio decidendi summary: high
The dispositive ratio is that claim terms should be given a purposive, functional construction (here, "suspension component" = any component outside chassis/body/drive train that varies in angle with load), and that, assessed against the skilled person (a designer/supplier of on‑board weighing systems with relevant common general knowledge), the claimed idea was obvious in view of Rothoff. Also, lack of commercial attractiveness does not prevent a finding of obviousness.
Obiter dicta
This summary is intended to identify obiter dicta, meaning observations made by the way that were not necessary to deciding the case and are not binding.
AI confidence in this obiter dicta summary: medium
The judgment suggested obiter that the claimed system need only be sensitive enough to indicate dangerous overloading (even by a simple alarm or strobe), implying a low sensitivity threshold for claim scope; it also noted contemporaneous improvements in inclinometer/accelerometer performance but treated that as neutral absent evidence of long‑felt need.