C Van Der Lely NV v Bamfords Ltd: HL 1963

The pith and marrow doctrine on the construction of patents claims was ‘necessary to prevent sharp practice.’ As to the doctrine of enablement as explained by Lord Westbury: ‘Lord Westbury must have meant experiments with a view to discovering something not disclosed. He cannot have meant to refer to the ordinary methods of trial and error which involve no inventive step and are generally necessary in applying any discovery to produce a practical result.’


Lord Reid


[1963] RPC 61


England and Wales


CitedClark v Adie HL 1877
The court should look to the ‘pith and marrow’ of the invention to see whether a patent infringement had occurred. For a claim be made for a ‘subordinate’ invention, it would have been necessary distinctly to claim it in the patent. . .

Cited by:

CitedKirin-Amgen Inc and others v Hoechst Marion Roussel Limited and others etc HL 21-Oct-2004
The claims arose in connection with the validity and alleged infringement of a European Patent on erythropoietin (‘EPO’).
Held: ‘Construction is objective in the sense that it is concerned with what a reasonable person to whom the utterance . .
CitedSynthon Bv v Smithkline Beecham Plc HL 20-Oct-2005
Synthon filed an international application for a patent. Before it was published, SB filed a similar application in the UK patents registry. Synthon had applied for the UK patent granted to SB to be revoked. Jacob J had found that the reader of the . .
Lists of cited by and citing cases may be incomplete.

Intellectual Property

Updated: 06 May 2022; Ref: scu.218733