Williams Manufacturing Co. v. United Shoe MacHinery Corp.

Background

The dispute involved a company that owned two patents by McFeely for machines used to shape and tack the heel area of shoes, and a maker who bought and used four machines copied from those patented commercial models. The lower courts found the later patent claims valid and that the rival’s machines infringed; the rival asked this Court to declare the claims invalid as mere repackaging of old parts.

Reasoning

The central question was whether the later patent covered genuine, new combinations or simply repatented old devices. The Court treated the lower courts’ factual findings as supported by evidence and affirmed. It held that each challenged claim was limited to specific combinations of parts that worked together in a new, useful way (including manual adjustments for different shoe sizes), and that the copied machines embodied those claimed combinations. The Court emphasized that the rival remains free to use older machines that lack the patented improvements.

Real world impact

The decision lets the patent owner exclude competitors who use machines embodying the claimed combinations and forces copied machines to be removed, licensed, or redesigned. At the same time, manufacturers may still use expired earlier designs that do not include the patented improvements. The ruling resolves liability for these particular machines but does not rewrite patent law generally.

Dissents or concurrances

Justice Black (with two colleagues) dissented, arguing the patent unlawfully claimed old elements in broad language, that the improvements were trivial, and that the patent unfairly extended monopoly power over the industry.