Patent Act — P-4 56
Exception — prior use 56 (1) Subject to subsection (2), if — before the claim date of a claim in a patent — a person, in good faith, committed an act that would otherwise constitute an infringement of the patent in respect of that claim, or made serious and effective preparations to commit such an act, it is not an infringement of the patent or any certificate of supplementary protection that sets out the patent, in respect of that claim, if the person commits the same act on or after that claim date. Transfer (2) If the act referred to in subsection (1) is committed or the preparations to commit it are made in the course of a business and that business, or the part of that business in the course of which the act was committed or the preparations were made, is subsequently transferred, (a) subsection (1) or paragraph (b), as the case may be, does not apply to an act committed by the transferor after the transfer; and (b) it is not an infringement of the patent or any certificate of supplementary protection that sets out the patent, in respect of the claim, if the transferee commits the act after the transfer. Exception — use or sale of article (3) The use or sale of an article is not an infringement of a patent or any certificate of supplementary protection that sets out the patent if that article was acquired, directly or indirectly, from a person who, at the time they disposed of it, could sell it without infringing the patent or the certificate (a) because the person, before the claim date of a claim in the patent, in good faith, committed an act that would otherwise constitute an infringement of the patent in respect of that claim and they disposed of the article before that claim date; or (b) under subsection (1) or paragraph (2)(b). Exception — use of service (4) The use of a service is not an infringement of a patent if the service is provided by a person who, under subsection (1) or paragraph (2)(b), is able to provide it without infringing the patent. Non-application (5) Subsection (1) or paragraph (3)(a) does not apply if the person referred to in that subsection or that paragraph was able, as the case may be, to commit the act or make the preparations to commit the act only because they obtained knowledge of the subject-matter defined by the claim, directly or indirectly, from the applicant of the application on the basis of which the patent was granted and they knew that the applicant was the source of the knowledge. Exception — use of article (6) Subject to subsection (7), the use of an article is not an infringement of a patent or any certificate of supplementary protection that sets out the patent, in respect of a claim, if the article was acquired, directly or indirectly, from a person who, before the claim date of that claim, in good faith, made or sold, or made serious and effective preparations to make or sell, an article that is substantially the same as the one used, for that use. Transfer (7) If the making or selling referred to in subsection (6) was done or the preparations to do so were made in the course of a business and that business, or the part of that business in the course of which the making or selling was done or the preparations were made, is subsequently transferred, then (a) subsection (6) or paragraph (b), as the case may be, does not apply in respect of an article that is made or sold by the transferor after the transfer; and (b) it is not an infringement of the patent or any certificate of supplementary protection that sets out the patent, in respect of a claim referred to in subsection (6), to use an article for the use referred to in that subsection if it was made or sold for that use by the transferee after the transfer. Non-application (8) Subsection (6) does not apply if the person referred to in that subsection was able to make or sell, or to make the preparations to make or sell, the article only because they obtained knowledge of the use defined by the claim, directly or indirectl