Legal Opinion
Pinpoint, Inc. v. Amazon. Com, Inc.
District Court, N.D. Illinois
Decided December 6, 2004No. 03 C 4954PublishedCited by 12 opinions
1Opinion of the Court
OPINION
POSNER, Circuit Judge,
Sitting by Designation.
Pinpoint filed this suit last year against Amazon.com and affiliates (for simplicity I’ll pretend that “Amazon.com” is the only defendant) for infringement of two business-method patents, U.S. Patent Nos. 5,758,257 and 6,088,722. The patents describe methodologies based on statistical theory, mathematics, and formal logic by which a retailer such as Amazon.com can identify customer ■ preferences and use those preferences to make recommendations to the customers for additional purchases. Amazon.com denies infringement but also argues that the…
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