Intellectual Property Rights

KSR International Co. v. Teleflex Inc.

550 U.S. 398 (2007)

Facts

Teleflex owned a patent relating to an adjustable vehicle pedal connected to an electronic throttle-control sensor.
Earlier adjustable-pedal systems were already known.
Electronic throttle-control sensors were also known in the automobile industry.
Teleflex alleged that KSR had infringed its patent by supplying an adjustable pedal fitted with an electronic sensor.
KSR argued that combining the two known elements was obvious to a person skilled in automobile design.
The District Court accepted KSR’s argument and held the claim obvious.
The Court of Appeals reversed because it found no sufficiently specific prior teaching, suggestion or motivation directing the precise combination.
The United States Supreme Court considered whether the appellate court had applied an unduly rigid test for obviousness.

Whether the patented combination of an adjustable pedal and electronic sensor involved an inventive step.
Whether an invention can be obvious even without an express statement in prior documents directing the exact combination.
Whether the “teaching, suggestion or motivation” test had been applied too rigidly.

A patent cannot be granted where the differences between the claimed invention and prior art would have been obvious to a person having ordinary skill in the relevant field.
Courts must consider:
the scope and content of prior art;
differences between prior art and the claim;
the level of ordinary skill;
relevant objective evidence.
Obviousness must be assessed through a flexible and practical inquiry.
A court may consider:
common sense;
market demand;
design need;
known problems;
predictable solutions;
ordinary creativity of the skilled person.
A combination of known elements is likely to be obvious when each element performs its known function and the combination yields only a predictable result.
The skilled person is not an automaton waiting for an express instruction in prior art.

Adjustable pedals and electronic throttle sensors were both established technologies.
The automobile industry was already moving from mechanical throttle cables toward electronic controls.
Designers therefore had a recognised reason to connect electronic sensors to existing pedal arrangements.
Prior art showed that sensors could be placed at different locations in pedal assemblies.
The claimed invention placed the sensor at a fixed pivot point in a known adjustable-pedal structure.
This arrangement solved a predictable problem using familiar components in an expected manner.
The Court criticised the lower court for demanding an express prior-art statement telling an engineer to make the exact combination.
Innovation often arises because a skilled person responds to:
known technical problems;
commercial pressures;
ordinary design choices;
improvements occurring in related technology.
An invention may therefore be obvious even where no single earlier document contains the complete combination.
The Court also explained the “obvious to try” principle.
Where there is:
a recognised problem;
a finite number of identified and predictable solutions; and
a reasonable expectation of success, pursuing one of those solutions may be obvious rather than inventive.
Teleflex had not shown that the combination produced an unexpected technical result or overcame a difficulty beyond ordinary engineering skill.
The patent claim therefore amounted to the predictable use of known elements.

The Supreme Court unanimously held the relevant patent claim obvious and invalid.
It rejected a rigid application of the teaching-suggestion-motivation test.
Obviousness must be assessed broadly through prior art, common sense and the ordinary creativity of the skilled person.
Use this case for: a predictable combination of familiar elements may be obvious even where no prior document expressly directs the exact combination.