An act which would otherwise constitute an act of infringement of a patent1 does not do so2 if:
(1) it is done privately and for purposes which are not commercial3;
(2) it is done for experimental purposes relating to the subject matter of the invention4;
(3) it consists of the extemporaneous preparation in a pharmacy of a medicine for an individual in accordance with a prescription given by a registered medical or dental practitioner or consists of dealing with a medicine so prepared5;
(4) it consists of a specified use connected with ships, aircraft, hovercraft or vehicles6;
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