{
  "url": "https://openlegislation.uk/patents-amendment-rules-1992/article-3",
  "json_url": "https://openlegislation.uk/patents-amendment-rules-1992/article-3.json",
  "legislation": "uksi/1992/1142",
  "legislation_title": "The Patents (Amendment) Rules 1992",
  "legislation_url": "https://openlegislation.uk/patents-amendment-rules-1992",
  "path": "article/3",
  "kind": "article",
  "number": "3",
  "heading": "Citation and commencement",
  "text": "For rule 22 there shall be substituted the following—\n“Unity of invention\n22 (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 special technical features, then those inventions shall be treated as being so linked as to form a single inventive concept for the purposes of the Act.\n(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.”.",
  "extent": null,
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/uksi/1992/1142/article/3",
    "retrieved_at": "2026-10-29T14:23:07.969948+00:00"
  },
  "licence": "Open Government Licence v3.0",
  "licence_url": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
  "attribution": "Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives."
}