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A few weeks ago I celebrated in this column a recent Federal Circuit decision, Cybersource Corp. v. Retail Decisions, Inc., in which the court held that a process is not “tied to a machine” if the steps can be performed, however impractically, without it. That is (or was) a good rule, and one that lawyers and judges can apply (or could have applied) easily. But on Sept. 15—exactly 30 days later—a different Federal Circuit panel held the exact opposite, dismissing the court’s earlier decision.