22.—(1) Without prejudice to the generality of section 14(5)(d), where two or more inventions are claimed (whether in a single claim or in separate claims), and there exists between or among those inventions a technical relationship which involves one or more of the same or corresponding technical features, then those inventions shall be treated as so linked as to form a single inventive concept for the purposes of the Act.
(2) In this rule, “special technical features” means those technical features which define a contribution which each of the claimed inventions, considered as a whole, makes over the prior art.