Armour Group Plc v Leisuretech Electronics Pty Ltd

Armour Group Plc v Leisuretech Electronics Pty Ltd

The patent is invalid for obviousness because the combination of local amplification with central power, IC amplifiers, and Cat.5 cable to carry both audio signals and DC power was part of the common general knowledge in 1997 and would have been an obvious technical choice for a skilled person. The insufficiency plea falls away as the claim is inherently limited to the power capabilities of Cat.5 cable.

Parties
Claimant: Armour Group plc; Defendant: LeisureTech Electronics Pty Limited; Claimant: LeisureTech Electronics Pty Limited; Defendant: Armour Home Electronics Limited; Defendant: QED Audio Products Limited
Jurisdiction
England and Wales
Judgment Date
14 November 2008
Procedural Posture
Patent Revocation and Infringement / Judgment
Outcome
Patent revoked
Legal Topics
Patent Validity, Obviousness, Insufficiency, Distributed Audio Systems
Intellectual Property Patent Law Patent Validity Obviousness Insufficiency Distributed Audio Systems

Case Brief

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Parties

Armour Group plc

Claimant

LeisureTech Electronics Pty Limited

Defendant

LeisureTech Electronics Pty Limited

Claimant

Armour Home Electronics Limited

Defendant

QED Audio Products Limited

Defendant

Procedural Posture

Patent Revocation and Infringement / Judgment

Legal Issues

  1. 1 Whether European Patent (UK) No. 1 004 221 B1 is invalid for obviousness over common general knowledge
  2. 2 Whether the patent is insufficient

Ratio Decidendi

The patent is invalid for obviousness because the combination of local amplification with central power, IC amplifiers, and Cat.5 cable to carry both audio signals and DC power was part of the common general knowledge in 1997 and would have been an obvious technical choice for a skilled person. The insufficiency plea falls away as the claim is inherently limited to the power capabilities of Cat.5 cable.

Court Disposition

Patent revoked

Orders

  • European Patent (UK) No. 1 004 221 B1 is invalid and must be revoked