For PROCD, INCORPORATED, Plaintiff - Appellant: Michael J. Lawton, Kenneth B. Axe, LATHROP & CLARK, Madison, WI, USA. Thomas N. O'Connor, John T. Gutkoski, Lauren C. Panora, HALE & DORR, Boston, MA, USA.

For MATTHEW ZEIDENBERG, SILKEN MOUNTAIN WEB SERVICES, INCORPORATED, Defendants - Appellees: Keith Napolitano, Madison, WI, USA. David A. Austin, Madison, WI.

For INFORMATION INDUSTRY ASSOCIATION, AMERICAN MEDICAL ASSOCIATION, ASSOCIATION OF AMERICAN PUBLISHERS, Amicus Curiae: June M. Besek, Morton D. Goldberg, Jesse M. Feder, SCHWAB, GOLDBERG, PRICE & DANNAY, New York, NY.

For BUSINESS SOFTWARE ALLIANCE, Amicus Curiae: Christopher A. Meyer, Michael R. Klipper, MEYER & KLIPPER, Washington, DC.

For SOFTWARE PUBLISHERS ASSOCIATION, Amicus Curiae: Barry D. Weiss, Stuart Smith, Ronald Julian Palenski, GORDON & GLICKSON, Chicago, IL, USA. Kenneth A. Wasch, Mark Nebergall, SOFTWARE PUBLISHERS ASSOCIATION, INC., Washington, DC.

For AMERICAN COMMITTEE FOR INTEROPERABLE SYSTEMS, Amicus Curiae: Mark Alan Lemley, UNIVERSITY OF TEXAS SCHOOL OF LAW, Austin, TX. Peter M.C. Choy, AMERICAN COMMITTEE FOR INTEROPERABLE SYSTEMS, Mountain View, CA.

Before COFFEY, FLAUM, and EASTERBROOK, Circuit Judges.

This work is in the public domain in the United States because it is a work of the United States federal government (see 17 U.S.C. 105).

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