T 0056/87 (Ion chamber) of 20.09.1988

The technical teaching in a prior art document should be considered in its entirety, as it would be done by a person skilled in the art. It is not justified to arbitrarily isolate parts of such document from their context in order to derive therefrom a technical information, which would be distinct from or even in contradiction with the integral teaching of the document. Thus, a technical feature which is derived from or based on dimensions obtained from a diagrammatic representation and which technically contradicts the teaching of the description, does not form part of the disclosure of this document.