"The Federal Circuit's nonprecedential decision in NimbeLink Corp. v. Digi International Inc., No. 2024-2292 (Fed. Cir. Feb. 23, 2026) has a split decision: Reversed a finding that the patent claims were invalid as indefinite; Affirmed the dismissal of NimbeLink's breach-of-contract claims arising from two non-disclosure agreements."
"The patent issue turned on a familiar question: whether the claim preamble adds a substantive limitation."
In NimbeLink Corp. v. Digi International Inc., the Federal Circuit issued a split decision addressing patent validity and contract law issues. The court reversed a lower court's finding that patent claims were invalid due to indefiniteness, determining that the preamble language did not render the claims impermissibly vague. Simultaneously, the court affirmed the dismissal of NimbeLink's breach-of-contract claims arising from two non-disclosure agreements. The central patent dispute involved the recurring legal question of whether language in a claim preamble functions as a substantive limitation on the scope of the claimed invention or merely provides context.
#patent-indefiniteness #claim-preamble #breach-of-contract #federal-circuit #non-disclosure-agreements
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