http://www.legislation.gov.uk/uksi/2007/3291/article/16/madeThe Patents Rules 2007Reference librariesenKing's Printer of Acts of Parliament2019-07-16PATENTS These Rules are made under the Patents Act 1977 (c. 37) (“the Act”). They regulate applications for patents and other procedures before the Patent Office in relation to patents. These Rules make substantial changes to both the drafting and effect of the Patents Rules 1995 (SI 1995/2093) which are revoked together with the other instruments listed in Schedule 6 to these Rules. PART 2 16 1 For the purposes of the Act, two or more inventions shall be treated as being so linked as to form a single inventive concept where there exists between those inventions a technical relationship which involves one or more of the same or corresponding special technical features. 2 In paragraph (1) “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.