Power of court to grant relief in cases of groundless threats of infringement proceedings
(1) Where any person (whether entitled to or interested in a patent or an application for patent or not) threatens any other person by circulars or advertisements or by communications, oral or in writing addressed to that or any other person, with proceedings for infringement of a patent, any person aggrieved thereby may bring a suit against him praying for the following reliefs, that is to say—
(a) a declaration to the effect that the threats are unjustifiable;
(b) an injunction against the continuance of the threats; and
(c) such damages, if any, as he has sustained thereby.
(2) Unless in such suit the defendant proves that the acts in respect of which the proceedings were threatened constitute or, if done, would constitute, an infringement of a patent or of rights arising from the publication of a complete specification in respect of a claim of the specification not shown by the plaintiff to be invalid the court may grant to the plaintiff all or any of the reliefs prayed for.
Explanation.—A mere notification of the existence of a patent does not constitute a threat of proceeding within the meaning of this section.