Russell Finex Ltd v Telsonic AG [2004] EWHC 474 (Ch) (17 March 2004)

Russell Finex Ltd v Telsonic AG [2004] EWHC 474 (Ch) (17 March 2004)

The Spiral and Single Bent Rod designs do not infringe claim 1 of EP (UK) 0652810, as the claim language and specification require 'circular' to mean a closed loop and 'rod-type resonators' to mean more than one rod; purposive construction does not extend protection to these variants as the skilled reader cannot...

Source-derived case information.

Citation
[2004] EWHC 474 (Ch)
Parties
Claimant: Russell Finex Limited; Defendant: Telsonic AG
Jurisdiction
England and Wales
Judgment Date
17 March 2004
Procedural Posture
Patent Declaration of Non Infringement / High Court Judgment
Outcome
Declaration of non-infringement granted
Legal Topics
Patent Claim Construction, Non Infringement, Purposive Construction, File Wrapper Estoppel
Intellectual Property Patent Law Patent Claim Construction Non Infringement Purposive Construction File Wrapper Estoppel

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Parties

Russell Finex Limited

Claimant

Telsonic AG

Defendant

Procedural Posture

Patent Declaration of Non Infringement / High Court Judgment

Legal Issues

  1. 1 Whether the Spiral and Single Bent Rod designs infringe claim 1 of EP (UK) 0652810
  2. 2 Interpretation of 'circular' and 'rod-type resonators' in claim 1
  3. 3 Role of reference numerals in claim construction

Ratio Decidendi

The Spiral and Single Bent Rod designs do not infringe claim 1 of EP (UK) 0652810, as the claim language and specification require 'circular' to mean a closed loop and 'rod-type resonators' to mean more than one rod; purposive construction does not extend protection to these variants as the skilled reader cannot conclude with reasonable confidence that the patentee intended to cover them.

Court Disposition

Declaration of non-infringement granted

Orders

  • Declaration that the Spiral and Single Bent Rod designs do not infringe claim 1 of EP (UK) 0652810