October Term 2006 · Docket 05-608

Can a patent licensee sue to invalidate a patent while paying royalties?

MedImmune seeks to challenge a patent's validity. Genentech argues the license contract bars that suit.

Official caption
MedImmune, Inc. v. Genentech, Inc.
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Argued
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Official Transcript

Verified source milestones

  1. — An official oral-argument transcript was verified.
  2. — 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. Kester argued the dispute is concrete.

    Ms. Mahoney described the complaint's four counts.

    Ms. Maynard argued the dispute involves money.

    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

MedImmune wants to invalidate a patent. Genentech wants to enforce the license contract.

Official sources for this section

How the case got here

The Supreme Court heard oral argument in this case on October 4, 2006.

Official sources for this section

What each side wants

MedImmune wants to invalidate the patent.

Genentech wants to enforce the license contract.

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What each side says

MedImmune argues the dispute is concrete.

Genentech argues the contract bars the suit.

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What the justices asked

Justice Ginsburg asked how a licensee challenges validity.

Justice Souter asked if the issue is jurisdictional.

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Why it matters

This case defines patent license enforcement. It affects how companies challenge patents. It shapes the balance between contract and patent law.

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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

Title and summary sources

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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