Whether a state-law legal-malpractice claim based on an attorney's handling of a patent case arises under federal patent law, so that 28 U.S.C. § 1338(a) gives federal courts exclusive jurisdiction.
Holding
No. Minton's malpractice claim did not arise under federal patent law, and § 1338(a) did not deprive Texas courts of jurisdiction.
Reasoning
A case ordinarily arises under federal law when federal law creates the plaintiff's cause of action. Minton's claim, however, was created by Texas malpractice law, not the Patent Act. A state-law claim can still fall within federal arising-under jurisdiction, but only in the special and narrow category identified in Grable & Sons Metal Products, Inc. v. Darue Engineering & Manufacturing: the claim must necessarily raise a federal issue that is actually disputed and substantial, and federal jurisdiction must be consistent with the congressionally approved division of responsibility between state and federal courts.
The patent issue was necessarily raised. Texas malpractice law required Minton to prove that his lawyers' alleged breach proximately caused his injury. That required a "case within a case": Minton had to show that he would have prevailed in the earlier patent-infringement action if his lawyers had timely raised the experimental-use exception to the on-sale bar.
The patent issue was also actually disputed. Minton maintained that the lease of TEXCEN was experimental and would have preserved the patent; the lawyers maintained that the lease was not experimental and that the infringement suit would have failed anyway. Thus, the parties genuinely contested the meaning and application of patent law.
But the federal issue was not substantial in the Grable sense. Substantiality concerns the importance of an issue to the federal system as a whole, not simply its importance to the parties. The patent question was central to Minton's damages claim, but that party-specific significance necessarily exists whenever a state claim depends on a disputed federal issue and cannot itself establish federal jurisdiction.
Unlike the federal questions in Grable and Smith v. Kansas City Title & Trust Co., the state court's answer would not control the validity of federal governmental action or establish a rule with broad legal consequences. The inquiry was retrospective and hypothetical: it asked what would have happened in Minton's already-completed infringement case had counsel made a particular argument. Whatever the answer, Minton's patent remained invalid under the actual federal judgment.
Allowing state courts to decide these hypothetical patent questions would not undermine uniform patent law. Actual patent cases remain within exclusive federal jurisdiction, with appellate review in the Federal Circuit, and federal courts are not bound by a state court's case-within-a-case ruling. State courts also can be expected to apply the governing federal precedents when reconstructing what the earlier federal litigation should have produced.
Any possible preclusive effect of a state malpractice decision on a related patent application would be uncertain and, at most, limited to the particular parties and patents involved. Such fact-bound, situation-specific consequences do not make a federal issue substantial for arising-under jurisdiction.
The fourth Grable requirement also favored state jurisdiction. States have a particularly strong and historic responsibility for regulating lawyers and enforcing professional standards through malpractice law. Nothing in Congress's grant of exclusive jurisdiction over actual patent cases indicated an intent to remove ordinary state malpractice suits from state courts merely because they require resolution of a hypothetical patent issue.