# The Patents Rules 1995, Article 22: Unity of invention


(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.

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Source: https://www.legislation.gov.uk/uksi/1995/2093/article/22 (the official version)
Page: https://openlegislation.uk/patents-rules-1995/article-22
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.