http://www.legislation.gov.uk/uksi/1999/1993/signature/madeThe Patent Office (Address) (Revocation) Rules 1999Regulatory impact assessmentKing's Printer of Acts of Parliament2011-07-04DESIGNSPATENTSTRADE MARKSThese Rules revoke the Patent Office (Address) Rules 1991 (S.I. 1991/675).Kim Howells,Parliamentary Under Secretary of State for Competition and Consumer Affairs,Department of Trade and Industry13th July 1999