October Term 2014 · Docket 13-896

Does a good-faith belief that a patent is invalid defeat inducement liability?

Commil argues that a good-faith belief in patent invalidity should block inducement liability. Cisco argues that such a belief is irrelevant to the intent requirement.

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Commil USA, LLC v. Cisco Systems, Inc.
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  1. — An official oral-argument transcript was verified.

The arguments, in order

This case may have been argued more than once. Each entry below uses that session's official transcript. Later arguments do not erase earlier ones.

  1. Argument 1 ·

    What happened at the argument

    Mr. Werbner argued that an infringer who actively induces cannot escape responsibility by claiming the patent is invalid.

    Ms. Anders asserted that a good-faith belief in non-infringement or invalidity should preclude liability for inducing enforcement.

    Mr. Waxman contended that the linchpin of scienter is knowledge that the induced acts violate the patentee's rights.

    Justice Scalia questioned whether common law aider and abetter liability requires wrongful intent beyond the primary actor's conduct.

    Read the official transcript for this argument · Official argument details

    Sources used for this argument breakdown

A citizen's guide to the whole case

What this case is about

The dispute centers on the mental state required for patent inducement. Commil claims a good-faith belief in invalidity negates the necessary intent. Cisco contends that knowledge of the patent's existence is sufficient for liability.

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How the case got here

The Supreme Court heard oral argument in this case on March 31, 2015.

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What each side wants

Commil wants the Court to hold that a good-faith belief in invalidity defeats inducement liability.

Cisco wants the Court to hold that a good-faith belief in invalidity does not defeat inducement liability.

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What each side says

Commil argues that inducement requires intent to do wrong, which a good-faith belief in invalidity negates.

Cisco argues that inducement requires only knowledge that the acts violate the patentee's rights, not a belief in validity.

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What the justices asked

Justice Scalia asked whether aider and abetter liability requires wrongful intent under common law.

Justice Kagan asked how a seller determines liability when patent construction is ambiguous.

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Why it matters

This case defines the mental state required for patent inducement. It determines whether good-faith beliefs in invalidity shield actors from liability. The outcome shapes patent enforcement and market competition.

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What happens next

This article currently covers the argument record. Use the official docket link for later case activity.

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Official Court provenance

Official docket and case history · Official Supreme Court oral-argument detail page

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Revision history

  1. Revision 1 · Official Transcript ·

    Correction: Rewritten to the concise citizen-facing editorial standard.

  2. Revision 2 · Official Transcript ·

    Correction: Migrated to the dated official Court activity contract without model use.

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