October Term 2005 · Docket 04-1329

Does a patent on a component create market power for the whole product?

Illinois Tool Works argues a patent on a razor blade creates market power for the entire razor system. Independent Ink disputes this legal presumption.

Official caption
Illinois Tool Works Inc. v. Independent Ink, Inc.
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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

    Andrew Pincus argued that illegal tying requires exploiting control over a tying product.

    Justice Breyer questioned why a patent holder would seek a patent without expecting price power.

    Justice Scalia asked if refuting the presumption equals demonstrating market power.

    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 case tests whether a patent on a single component legally implies market power for the larger product. Illinois Tool Works seeks to establish this presumption. Independent Ink argues the presumption is legally incorrect.

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How the case got here

The Supreme Court heard oral argument in this case on November 29, 2005.

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What each side wants

Illinois Tool Works wants the Court to recognize a patent as evidence of market power for the larger product.

Independent Ink wants the Court to reject the presumption that a component patent implies market power for the whole product.

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What each side says

Illinois Tool Works argues that a patent on a component legally establishes market power for the entire product.

Independent Ink argues that a patent on a component does not legally establish market power for the entire product.

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What the justices asked

Justice O'Connor asked if a patent spreads to cover the larger product.

Justice Stevens asked if a patent generating metering implies more power than average patents.

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Why it matters

The outcome defines how courts assess market power in patent cases. It determines whether a component patent legally implies control over the entire product market. This standard affects antitrust litigation involving patented goods.

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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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