Norwich Pharmacal Co. & Others v Customs and Excise Commissioners [1974] AC 133 was a case involving the owner and exclusive licensee of a patent, which was infringed by unknown importers of the chemical into the United Kingdom.

Norwich Pharmacal Co brought proceedings against the Excise Commissioners to force the disclosure of information which would identify the importer of the chemical, and therefore those who infringed the patent.

The case was brought by Norwich Pharmacal Co. and the exclusive licensee of a patent for an antibacterial called furazolidone.

In Norwich Pharmacal Co. v Customs and Excise Commissioners [1974] the House of Lords held that where a third party has information relating to unlawful conduct, a court could compel them to assist the person suffering damage by giving them that information.

By identifying individuals the documents and information sought are disclosed in order to assist the applicant for such an order in bringing legal proceedings against individuals who are believed to have wronged the applicant.