Prior to ordering injunctive relief, which is an equitable remedy, the court must weigh the harm to defendant if the injunction is imposed, against the harm to plaintiff if no injunction is ordered. There have been cases where the court finds likely consumer confusion (the requirement of a finding of trademark infringement), yet refuses to enjoin the defendant from using the mark on the basis that defendant made a substantial good-faith investment in a mark, and the harm to defendant in loosing that investment outweighed the harm to plaintiff. See e.g. Mushroom Makers, Inc. v. R.G. Barry Corp., 580 F.2d 44 (2d Cir. 1978).
