KSR International Co. v. Teleflex Inc.

Background

Teleflex, which held an exclusive license to a patent claiming an adjustable car pedal with an electronic position sensor, sued KSR after KSR supplied adjustable pedals with an off‑the‑shelf modular sensor for General Motors trucks. The patent’s key feature was a sensor attached to a fixed pivot point so the pedal’s position could be sent to a vehicle computer while the pedal slid fore and aft. KSR argued the claim was invalid as obvious because earlier patents and commercial sensors already taught putting sensors on pedal structures or pivot points. The District Court agreed with KSR and granted summary judgment; the Federal Circuit reversed.

Reasoning

The Supreme Court reviewed the legal standard for obviousness and rejected a rigid application of the Federal Circuit’s teaching‑suggestion‑motivation (TSM) test. The Court said obviousness should be judged under the broader Graham framework and may consider common sense, market pressures, and how a person of ordinary skill would combine multiple prior teachings. Looking at prior patents (Asano, Smith, Rixon, and modular sensor disclosures), the Court concluded it would have been obvious to mount a sensor on Asano’s fixed pivot point. Because the patent scope, prior art, and skill level were undisputed, the Court held claim 4 obvious and reversed to allow the invalidity judgment.

Real world impact

The decision makes it easier to challenge patents that simply assemble familiar parts to achieve predictable results. Companies defending against infringement suits, patent examiners, and courts may rely more on market evidence and common sense in obviousness inquiries. The ruling signals that many combination patents that reflect ordinary improvements rather than true innovation may be vulnerable.