William R. Warner & Co. v. Eli Lilly & Co.

Background

A longtime maker of a chocolate-flavored liquid quinine called Coco-Quinine sued a related rival that began selling a similar product called Quin-Coco. The rival’s product used chocolate for color and taste and was sold more cheaply. The manufacturer of Coco-Quinine sought to stop the rival from using chocolate or the Quin-Coco name, claiming both trademark infringement and unfair competition. Lower courts split: they rejected trademark infringement but disagreed about unfair competition, so the issue came to this Court.

Reasoning

The Court first held that both product names merely described ingredients and so could not be exclusively owned. On unfair competition, the Court found chocolate gave the product a distinctive color and flavor but no medicine value; the respondent had first developed that idea. Evidence showed the rival made a product identical in taste and color and its sales efforts pushed druggists to substitute Quin-Coco for Coco-Quinine because it cost less. Although bottled sales to druggists had distinct labels, retail dispensing out of the bottle led to many instances of passing off. The Court concluded the rival induced and enabled deception and so engaged in unfair competition.

Real world impact

The Court declined to forbid chocolate as an ingredient but allowed an injunction to stop practices that lead to passing off. The rival must not represent or suggest customers can substitute its product for Coco-Quinine and must use clear labels on original packages stating the product is not to be sold or dispensed as Coco-Quinine or used to fill prescriptions calling for it. The case was sent back to the District Court to craft the precise injunction.