• Supreme Court Rejects Rigid Application of "Teaching, Suggestion, or Motivation" Test in Favor of Expansive and Flexible Approach to Obviousness Inquiry
  • May 4, 2007
  • Law Firm: Duane Morris LLP - Philadelphia Office
  • KSR International Co. v. Teleflex Inc., et al., No. 04-1350

    In an April 30, 2007 opinion, the U.S. Supreme Court held the Federal Circuit incorrectly applied the "teaching, suggestion, or motivation" (TSM) test in reversing a grant of summary judgment of invalidity for obviousness of a patent claim directed to an adjustable pedal assembly for vehicles. The Supreme Court concluded that the Federal Circuit addressed the obviousness issue in a narrow, rigid manner inconsistent with 35 U.S.C. ยง 103 and Supreme Court precedent. Because of convincing evidence that a prior art reference taught nearly the entire subject matter of the contested claim, and that the only limitation not taught by the prior art reference was well within the grasp of a person of ordinary skill in the relevant art, summary judgment of invalidity was appropriate, the Federal Circuit's judgment was reversed, and the case was remanded for further proceedings.

    Teleflex sued KSR, a competitor, in the U.S. District Court for the Eastern District of Michigan alleging infringement of U.S. Patent No. 6,237,565 ("'565 Patent"), which is directed to an adjustable pedal assembly that includes an electronic pedal position sensor. On a motion for summary judgment of invalidity, KSR argued that asserted claim 4 of the '565 Patent was largely taught by U.S. Patent No. 5,010,782 to Asano ("Asano") and that the only feature not taught by Asano - mounting a modular sensor on a fixed pivot point of the pedal - was obvious. The District Court agreed, after applying the framework for the obviousness inquiry enunciated in Graham v. John Deere Co., 383 U.S. 1, 17-18 (1966), which requires an analysis of (1) the scope and content of the prior art, (2) the level of ordinary skill in the art, (3) the differences between the prior art and the claimed invention, and (4) the extent of any objective indicia of non-obviousness, and finding that KSR satisfied controlling Federal Circuit precedent requiring application of the TSM test, i.e., that in order for a claim to be rendered obvious, there must be some teaching, suggestion, or motivation to combine prior art teachings either in the prior art itself, the nature of the problem, or the knowledge of those of ordinary skill in the art. The Federal Circuit reversed the grant of summary judgment, holding that the District Court did not properly apply the TSM test because it failed to make "findings as to the specific understanding or principle within the knowledge of a skilled artisan that would have motivated one with no knowledge of the invention" to make the combination in the manner claimed.

    The Supreme Court reversed the Federal Circuit's decision in a unanimous opinion written by Justice Kennedy. In contrast to the "rigid approach" taken by the Federal Circuit, the Supreme Court emphasized that its prior cases have set forth an expansive and flexible approach to determining obviousness. Deriving from the "functional approach" of Hotchkiss v. Greenwood, 11 How. 248 (1851), the Supreme Court explained that the Graham factors provide a broad inquiry and invited lower courts to look at secondary considerations, such as commercial success, long felt but unsolved needs, and the failure of others.

    The Supreme Court reiterated that the combination of familiar elements according to known methods is likely to be obvious when it does no more than yield predictable results. The Court also noted that if a technique has been used to improve a device, and a person of ordinary skill in the art would recognize that it would improve similar devices in the same way, using the technique is generally obvious unless its actual application is beyond the person's ordinary skill. While recognizing it will often be necessary to consult a variety of sources to determine whether there was an apparent reason to combine known elements in the manner claimed, the Court was careful to point out that this analysis "need not seek out precise teachings directed to the specific subject matter of the challenged claim, for a court can take account of the inferences and creative steps that a person of ordinary skill in the art would employ."

    Importantly, the Court noted that the TSM test was not necessarily inconsistent with the Graham analysis or other Supreme Court precedent. Indeed, the Court recognized that the TSM test is useful in that it captures a helpful insight: the reason prompting a person to combine elements independently known in the prior art in a new way is an important consideration. The Federal Circuit erred, however, because it transformed this insight into a rigid formula, improperly shifting the focus of the inquiry from the objective reach of the claim to the particular motivation or avowed purpose of the patentee.

    The first error identified by the Supreme Court in the Federal Circuit's reasoning was the holding that courts and examiners should look only to the problem the patentee was trying to solve. The question is not whether the combination was obvious to the patentee but whether the combination was obvious to a person with ordinary skill in the art. Under the correct analysis, "any need or problem known in the field at the time of invention that is addressed by the patent can provide a reason for combining the elements in the manner claimed." The second error identified by the Court was the Federal Circuit's "assumption that a person of ordinary skill attempting to solve a problem will be led only to those elements of prior art designed to solve the same problem." The Supreme Court explained that "[c]ommon sense teaches, however, that familiar items may have obvious uses beyond their primary purposes." Further, this assumption ignores the likelihood that during the inventive process one of ordinary skill in the art may consult and synthesize the teachings of multiple references, like putting together pieces of a puzzle. Recognition that the person of ordinary skill in the art has at least a modest amount of ordinary creativity also shows that where a combination of prior art elements is more a product of ordinary skill and common sense than of true innovation, proof that a combination is "obvious to try" may be sufficient to establish that the "invention" is obvious.

    Applying these legal standards to the facts of the case, the Supreme Court concluded, like the District Court, that claim 4 of the '565 Patent was obvious. Considering that there was a strong incentive in the marketplace to convert mechanical pedals to electronic pedals, the Federal Circuit considered the issue too narrowly by inquiring as to whether one of ordinary skill in the art writing on a blank slate would have added a prior art sensor to the Asano pedal assembly. Rather, the proper question should have been whether a pedal designer of ordinary skill, facing the wide range of needs created by developments in the field, would have seen a benefit to upgrading Asano with a sensor. In view of the cumulative teachings of the prior art references, the Court concluded, the concept and benefit of adding an electronic sensor to the Asano pedal was indeed obvious. Accordingly, the judgment of the Federal Circuit was reversed.

    For the full opinion, see: http://www.supremecourtus.gov/opinions/06pdf/04-1350.pdf