By section 18 of the Finance (No. , the Schedule to the Act was further amended substituting the Explanation 1 by the following: "Explanation 1: "Patent or proprietary medi cines" means any medicinal preparation which bears either on itself or on its container or both a name which is not specified in a mono graph in a Pharmacopoeia, Formulary or other Publications notified in this behalf by the Central Government in the Official Gazette, or which is a brand name, that is a name or a registered trade mark under the Trade and Merchandise Mark Act, 1958 (43 of 1958), or any other mark such as a symbol, monogram, label, signature or invented words or any writing which is used m relation to that medicinal preparation for the purpose of indicating or so as to indicate a connection in the course of trade between as preparation and some person having the right either as proprietor or otherwise to use the name or mark with or without any indication of the identity of that person.