Industrial and Commercial Property (Protection) Act, 1927

Exemption of innocent infringer from liability for damages.

51.—A patentee shall not be entitled to recover any damages in respect of any infringement of a patent from any defendant who proves that at the date of the infringement he was not aware, nor had reasonable means of making himself aware, of the existence of the patent, and the marking of an article with the word “patent,” “patented,” or any word or words expressing or implying that a patent has been obtained for the article, stamped, engraved, impressed on, or otherwise applied to the article, shall not be deemed to constitute notice of the existence of the patent unless the word or words are accompanied by the year and number of the patent:

Provided that nothing in this section shall affect any proceedings for an injunction.