| (1) | Where any person, by circular, advertisement or otherwise, threatens any other person with proceedings for infringement of a patent, a person aggrieved thereby may, whether the person making the threats is or is not entitled to or interested in a patent, or an application for a patent, institute proceedings against him and obtain a declaration to the effect that such threats are unjustifiable and an interdict against the continuance of such threats, and may recover such damages, if any, as he has sustained thereby, unless the person making the threats proves that the acts in respect of which the proceedings are threatened, constitute or, if done, would constitute an infringement of a patent in respect of a claim in the specification which is not shown by the plaintiff to be invalid: Provided that a circular, advertisement or communication addressed to any person, which comprises only a notification of the existence of a particular patent upon which the proprietor relies for protecting his interests shall not, by itself, be deemed to be a threat of proceedings for infringement. |
