EB: GOTTSCHALK v. BENSON, 409 U.S. 63 (1972)

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The Situation

  • Benson develops a "method for converting numerical information from binary-coded decimal numbers into pure binary numbers."
  • Gottschalk is the commissioner of patents who originally rejected the patent, Benson appealed and won - Supreme Court grants centiorari


  • Benson's patent is invalid (sustaining the examiners original decision, but reversing the Appeals court decision)


  • You can't patent an idea - if you discover a "phenomenon of nature" you can't claim a monopoly on it unless you apply the law of nature to a "new and useful end"
    • The claims of Benson's patent were sweeping - claiming all rights to the process developed (whether by a computer or by hand)
  • A process is patentable if it transforms or reduces the subject matter to a "different state or thing"
    • Benson's patent would "wholly pre-empt the mathematical formula and in practical effect would be a patent on the algorithm itself."
      • In other words, Benson's patent is for a mathematical formula/algorithm, and these are ruled to be ideas, which alone are not patentable
  • Important outcome: You can't patent a computer program (as of 1972)

In Class

  • Key issue: Section 101 - patentable subject matter - "process, machine, manufacture, or composition of matter"
    • Composition of matter = new material, polymer...
    • Machine = pretty straight forward, device, gizmo...
    • Process = the tricky part
  • You can appeal a patent examiners decision during the application process - that is what happened here; appealed to the Court of Customs and Patent Appeals
  • Binary-coded decimal: you can represent every number with a sequence of four 0's and 1's - then you can just combine those sequences
    • The patent in question converts BCD to pure binary notation (a more condensed form)
  • The Supreme Courts reasoning:
    • An idea cannot be patented; you can't patent a mathematical principle or "law of nature" because doing so would impede progress - however, you can seek a patent on a "new and useful" application of such a principle or "law of nature"
  • There are certain "first principles" that are necessary building blocks for all progress in the art - so, if someone were to own those "first principles" it would halt all progress - this is not the intension of the patent system
  • Can't patent: Scientific truth, mathematical expression of a scientific proof, idea
  • Can patent: Structure created with knowledge of a scientific truth