Patents Act, 1970
49. Patent rights not infringed when used on foreign vessels, etc. temporarily or accidentally in India
(1) Where a vessel or aircraft registered in a foreign country or a land vehicle owned by a person ordinarily resident in such country comes into India (including the territorial waters thereof) temporarily or accidentally only, the rights conferred by a patent for an invention shall not be deemed to be infringed by the use of the invention-
(a) in the body of the vessel or in the machinery, tackle, apparatus or other accessories thereof, so far as the invention is used on board the vessel and for its actual needs only; or
(b) in the construction or working of the aircraft or land vehicle or of the accessories thereof, as the case may be.
(2) This section shall not extend to vessels, aircraft or land vehicles owned by persons ordinarily resident in a foreign country the law of which do not confer corresponding rights with respect to the use of inventions in vessels, aircraft or land vehicles owned by persons ordinarily resident in India while in the ports or within the territorial waters of that foreign country or otherwise within the jurisdiction of its courts.