Graham v. John Deere Co. and the Modern Non-Obviousness Test

I. Introduction: Non-Obviousness in Patent Law

In the U.S., for a patent to be valid under 35 U.S.C. § 103, the invention must be non-obvious at the time it was made to a person having ordinary skill in the art (PHOSITA).

Non-obviousness prevents patents on inventions that are trivial extensions of existing knowledge.

Prior to Graham, courts struggled with a clear framework to determine obviousness. Graham v. John Deere Co. (1966) established the modern test.

II. Graham v. John Deere Co., 383 U.S. 1 (1966)

Facts

John Deere held a patent on a combined plow with adjustable hitch.

Graham developed a similar plow but used a slightly different adjustable mechanism.

Graham challenged the patent as obvious.

Legal Issue

What standard should courts use to determine obviousness under §103?

How should courts apply factual evidence in an obviousness inquiry?

Holding

Supreme Court ruled that John Deere’s patent was invalid because it was obvious.

Modern Non-Obviousness Framework Established

The Court outlined a four-factor test (Graham Factors):

Scope and content of the prior art – Examine existing patents, publications, and common knowledge.

Differences between prior art and the claimed invention – Identify what is truly new.

Level of ordinary skill in the pertinent art – Determine the PHOSITA.

Secondary considerations / objective evidence – Commercial success, long-felt need, failure of others, skepticism by experts.

Significance:

Shifted non-obviousness from subjective intuition to a structured factual inquiry.

Introduced secondary considerations as a key tool to avoid hindsight bias.

III. Key Related Cases Applying or Refining the Graham Test

1. KSR International Co. v. Teleflex Inc., 550 U.S. 398 (2007)

Facts:

Teleflex sued KSR for patent infringement on an adjustable pedal assembly.

KSR argued the patent was obvious in light of prior art.

Holding:

Supreme Court reaffirmed and modernized Graham.

Reasoning:

Courts should not apply a rigid “teaching, suggestion, or motivation” (TSM) test only.

Obviousness can be found through common sense, ordinary creativity, and predictable results.

Impact on Modern Non-Obviousness Test:

Graham framework still applies.

KSR emphasizes flexibility and practical reasoning, not just formal prior art comparison.

Takeaway:

Obviousness can include combining known elements if the combination is predictable to a PHOSITA.

2. Anderson’s-Black Rock, Inc. v. Pavement Salvage Co., 396 U.S. 57 (1969)

Facts:

Pavement recycling apparatus claimed as a combination of known machines.

Question: Is combining old devices patentable?

Holding:

Combination was obvious; patent invalid.

Reasoning:

The elements were well-known and functioned in a predictable way.

No inventive step beyond prior art.

Graham Connection:

Applied prior art comparison and differences analysis.

Reinforced that mere aggregation without synergy is obvious.

3. Lehman v. Gillette, 22 F.2d 621 (1927) (Pre-Graham, shows historical context)

Facts:

Improvement in razor blade design claimed as patentable.

Holding:

Patent invalid for lack of inventive step.

Significance:

Pre-Graham, courts used intuition, not structured factors.

Graham formalized this ad-hoc analysis.

4. DyStar Textilfarben GmbH v. C.H. Patrick Co., 464 F.3d 1356 (Fed. Cir. 2006)

Facts:

DyStar claimed a dyeing process patent.

Patent challenged as obvious based on prior chemical art.

Holding:

Patent invalid for obviousness.

Application of Graham:

Court examined prior art, differences, and PHOSITA skill level.

Secondary considerations (commercial success, long-felt need) were considered insufficient to overcome obviousness.

Takeaway:

Graham factors guide the evaluation, but objective evidence alone cannot save an obvious invention.

5. In re Rouffet, 149 F.3d 1350 (Fed. Cir. 1998)

Facts:

Patent claim on a chemical compound challenged as obvious.

Holding:

Obvious; invalid.

Application of Graham:

Court used the four-factor test: prior art, differences, PHOSITA, secondary considerations.

Highlighted hindsight bias danger, showing why Graham emphasized contemporaneous evidence.

6. Festo Corp. v. Shoketsu Kinzoku Kogyo Kabushiki Co., 535 U.S. 722 (2002) (Obviousness in doctrine expansion)

Facts:

Patents on mechanical parts modified during prosecution.

Question: Were claims obvious given amendments?

Holding:

Doctrine of equivalents cannot extend to obvious modifications.

Graham Relevance:

Reinforces PHOSITA and prior art analysis.

Shows how secondary considerations and claim scope interact with obviousness.

7. Pfizer, Inc. v. Apotex, Inc., 480 F.3d 1348 (Fed. Cir. 2007)

Facts:

Pharmaceutical patent challenged as obvious over prior art compounds.

Holding:

Patent valid; non-obvious.

Reasoning:

Court applied Graham factors: prior art did not teach the claimed compound combination.

Secondary considerations (unexpected results, commercial success) supported non-obviousness.

Takeaway:

Non-obviousness requires both objective analysis and secondary evidence.

IV. Summary: Modern Non-Obviousness Test

Graham Factors (Modern Application):

Key Insights:

KSR v. Teleflex added flexibility, allowing common sense combinations to invalidate patents.

Combination patents require synergistic or unexpected results to be non-obvious.

Secondary considerations can support non-obviousness but cannot override clear prior art.

The risk of hindsight bias is central; evidence must reflect the time of invention.

V. Conclusion

Graham v. John Deere set the structured foundation for evaluating non-obviousness. Modern cases like KSR v. Teleflex, DyStar, and Pfizer v. Apotex show:

Non-obviousness remains a fact-intensive inquiry.

Both legal standards and practical reasoning (common sense, predictability) are applied.

Secondary considerations act as supporting evidence, not a substitute for prior art analysis.

In short: Graham formalized a practical, evidence-driven, and PHOSITA-centered non-obviousness test that still governs U.S. patent law today.