<Li> revocation of patents in certain cases . </Li> <P> The Criminal Code was also amended by inserting s . 498, which created a corresponding offence of combining to limit facilities, restrain commerce, or lessen manufacture or competition . These measures essentially repeated the previous legislation, without employing the regulatory framework that had previously been found to be unconstitutional . </P> <P> The Proprietary Articles Trade Association was formed in Canada in 1925, with objects similar to organizations of the same name formed in several other Commonwealth countries . It was investigated under the Act, and found to be a combine within its scope . </P> <P> The following reference questions were posed to the Supreme Court of Canada: </P>

Proprietary articles of trade association v attorney-general for canada 1931 ac 310