Great Atlantic & Pacific Tea Co. v. Supermarket Equipment Corp.

Background

A supermarket chain and an equipment maker disputed a patent on a cashier’s counter system: a bottomless three-sided sliding frame or rack that moves groceries to the cashier and then returns for the next customer. Two lower courts found the patent claims valid and the parties agreed that, if valid, those claims had been infringed. The lower courts treated an extension of the counter as the novel feature that justified the patent.

Reasoning

The Supreme Court examined whether the claimed device showed true invention or merely combined old, known parts. The Court found that each element was known in prior art, the extension was not clearly claimed and even if considered, was not inventive. The Court applied the rule that a mere aggregation of old parts that perform no new or different function is not patentable. It rejected relying on commercial success or a long-felt want as proof of invention when the elements themselves add no new function.

Real world impact

The Court reversed the lower courts and held the claims invalid, meaning the specific patent cannot block supermarkets or suppliers from using similar counter arrangements based only on combining old parts. The decision stresses careful review of combination patents and limits monopolies that would merely withdraw familiar tools from public use. The ruling is not limited to this device; it sets a stricter test for patents made entirely from old components.

Dissents or concurrances

A concurring opinion emphasized that the constitutional purpose of patents is to advance science and that the Court must decide the legal standard of invention, rejecting any rule that would let lower courts’ factual findings override that standard.