Nature of the problem
Until a little while ago the subject of licences was commonly treated, from the standpoint of their revocability by the licensor, as one of the principal illustrations of the relations between equity and law. Denning L.J. has repeatedly ex cathedra insisted that fusion has now been effected, not only between the courts wherein the systems of law and equity were administered but between those systems themselves. In this particular subject, while it may be doubtful whether law and equity are fused, there is, unhappily, a certainty that they have been confused.