The Supreme Court of Canada recently denied leave to appeal from the Federal Court of Appeal’s (the “FCA”) decision in Sadhu Singh Hamdard Trust v. Navsun Holdings Ltd., 2019 FCA 10 (CanLII). Caroline Camp writes about the implications of the case. Most interesting is that the FCA confirmed that intervening use of a mark by a third party, even if that use amounts to infringement of a registered trademark, can be sufficient to cause the registered mark to lose its distinctiveness and therefore become unenforceable. So the mantra “use it or lose it” is actually “use it and enforce it or lose it” in Canadian trademark practice. Read her complete article here.