Versions of s. 56(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.