- “65th Annual Intellectual Property Law Conference: Panel on the Federal Circuit in Review,” University of Illinois Chicago School of Law, November 2021 (panelist)
- “Fourteenth Annual Conference on Innovation Economics: Panel on Competition and Innovation,” U.S. Patent & Trademark Office, August 2011 (panelist).
- “The Injunction Function,” Symposium on Public Rules for Private Valuation, Notre Dame Law School, October 2020.
- “O’Reilly v. Morse,” Symposium on the Rise of Intellectual Property in the 18th and 19th Centuries, Classical Liberal Institute at NYU School of Law, July 2020.
- “Injunctions in Patent Law,” Property Works in Progress conference, Northeastern University School of Law, September 2019.
- “Injunctions in Patent Law,” Intellectual Property Scholars Conference, DePaul Law School, August 2019.
- “Whither Oil States? The Future of Patents as Property Rights,” IP Lecture Series, John Marshall Law School, March 2019.
- “How to Make IP a Higher Priority for Everyone,” Intellectual Property Awareness Summit of the Center for IP Understanding, Columbia University, November 2018.
- “Institutional Design Choice in Patent Systems,” Convergence and Divergence in Private Law Theory, Classical Liberal Institute at NYU School of Law, November 2018.
- “Statutes, Common-Law Rights, and the Mistaken Classification of Patents as Public Rights,” Administering Patent Law Symposium, University of Iowa College of Law, October 2018.
- “The Role of Intellectual Property in a Thriving Innovation Economy,” Hayek Lecture Series, Duke University, September 2017
- “Trademark as a Property Right,” Intellectual Property Scholars Conference, Cardozo Law School, August 2017
- “Trademark as a Property Right,” IP in the Trees Speaker Series, Lewis & Clark Law School, February 2017
- “Trademark as a Property Right,” Property Works in Progress Conference, Boston University School of Law, September 2016
- “Trademark as a Property Right,” Research Symposium Philosophical Issues in IP, May 2016
- “O’Reilly v. Morse,” The History of Patented Innovation and Creativity Conference, George Mason University School of Law, September 2014.
- “A Brief History of Software Patents (and Why They’re Valid),” IP Scholars Conference, UC-Berkeley, August 2014.
- “O’Reilly v. Morse,” CPIP Summer Law Institute, Colorado, July 2014.
- “O’Reilly v. Morse,” IP2 Conference, Hoover Institution (Stanford University), May 2014.
- “Empirical Studies in Trademark Data Workshop,” U.S. Patent & Trademark Office, September 2013 (Discussant: “Trademarks & British Dominance in Consumer Goods, 1876-1914”).
- “Patents as Property Rights: The Uniquely American Constitutional Mandate for Promoting Innovation,” Constitution Day Talk, Marymount University, September 13, 2013.
- “Copyright and Commercialization: A Case Study in Academic Publishing,” IP Scholars Conference, August 2013.
- “What Hath Tawney Wrought? Reevaluating the Famous Case of O’Reilly v. Morse,” IP Colloquium Speaker Series, Marquette University, March 2013.
- “Patent Wars from Sewing Machines to Smart Phones,” Smithsonian Institution, Museum of American History, January 2013.
- “Patent Assertion Entities,” FTC-DOJ Workshop, Washington, D.C., December 2012 (panelist at invite-only conference on “Possible Efficiencies of PAE”).
- “The Trespass Fallacy in Patent Law,” Levy Workshop, George Mason University School of Law, August 2012.
- “The Trespass Fallacy in Patent Law,” Property Works-in-Progress Conference, Fordham University School of Law, June 1-3, 2012.
- “What Hath Tawney Wrought? Reevaluating the Famous Patent Case of O’Reilly v. Morse,” George Washington University Intellectual Property Speakers Series, October 2011.
- “Saving Locke from Marx: Two Conceptions of Value in Intellectual Property Theory,” Social Philosophy & Policy Center Conference, April 2011.
- “Saving Locke from Marx: Two Conceptions of Value in Intellectual Property Theory,” Cardozo Law School, January 2011.
- “O’Reilly v. Morse: Reevaluating a Foundational Patent Case in Historical Context,” Intellectual Property Scholars Conference, UC-Berkeley, August 2010.
- “The Rise and Fall of the First American Patent Thicket,” DOJ/FTC/PTO Seminar Series, June 2010.
- “Trespass, Patents, and the Failure of Land-Based Metrics in Patent Law,” Faculty Colloquium, Louisiana State Law Center, March 2010.
- “Individual Rights, Property and Intellectual Property,” Social Philosophy & Policy Center at Bowling Green State University, March 2010.
- “The Rise and Fall of the First American Patent Thicket: The Sewing Machine War of the 1850s,” Association for Law, Property & Society, Georgetown University Law Center, March 2010.
- “The Rise and Fall of the First American Patent Thicket: The Sewing Machine War of the 1850s,” Distinguished Professor Presentation at the John Marshall Law School, February 2010.
- “Land Patents: The Myth and Reality of Patents as Property,” Intellectual Property Scholars Conference, Cardozo Law School, August 2009.
- “Property Myths in Patent Law,” Works in Progress in Property, University of Colorado at Boulder School of Law, June 2009.
- “Sewing Machines, Patent Thickets and Patent Pools,” Legal History Roundtable, George Mason University School of Law, April 2009.
- “Sewing Machines, Patent Thickets and Patent Pools,” IP Colloquium, Columbia Law School, March 2009.
- “Rethinking the Labor Theory of Property,” University of Texas at Austin (Philosophy Department), April 2008.
- “Patents, Property and Property Theory,” Washington & Lee University School of Law, February 2008.
- “Patents, Property and Property Theory,” George Mason University School of Law, January 2008.
- “Patents, Property and Property Theory,” University of San Diego School of Law, November 2007.
- “Patents as Property: Rethinking the Role of Property Theory in American Patent Law,” Academic Workshop, University of Chicago Law School, November 2007.
- “Patents as Property: Rethinking the Role of Property Theory in American Patent Law,” Works-in-Progress Intellectual Property Colloquium, Washington College of Law at American University, September 2007.
- “Conceptualizing Patents as Property: Property Theory and Exclusive Rights in Patent Law,” Property Works-in-Progress Conference, University of Colorado Law School, June 2007.
- “Patents as Property: Rethinking the Exclusive Right in Patent Law,” Anthem Workshop on Law at the University of Texas at Austin, Philosophy Department, April 2007.
- “Patents as Property: Rethinking the Exclusive Right in Patent Law,” Colloquium on Technology, Innovation, and Technology Policy at University of Arizona James E. Rogers College of Law, October 2006.
- “Patents as Property: Rethinking the Exclusive Right in Patent Law,” Intellectual Property Scholars Conference, Boalt Hall School of Law, UC-Berkeley, August 2006.
- “Who Cares What Thomas Jefferson Thought About Patents: Reconsidering the Patent ‘Privilege’ in Historical Context,” Edward D. Manzo Scholar in Advanced Concepts in Patent Law Seminar, DePaul University School of Law, April 2006.
- “Who Cares What Thomas Jefferson Thought About Patents: Reconsidering the Patent ‘Privilege’ in Historical Context,” Santa Clara University School of Law, March 2006.
- “Who Cares What Thomas Jefferson Thought About Patents: Reconsidering the Patent ‘Privilege’ in Historical Context,” Case Western University School of Law, February 2006.
- “Who Cares What Thomas Jefferson Thought About Patents: Reconsidering the Patent ‘Privilege’ in Historical Context,” Whittier Law School, January 2006.
- “Who Cares What Thomas Jefferson Thought About Patents: Reconsidering the Patent ‘Privilege’ in Historical Context,” Intellectual Property Speakers Series, George Washington University School of Law, October 2005.
- “Who Cares What Thomas Jefferson Thought About Patents: Reconsidering the Patent ‘Privilege’ in Historical Context,” Works-in-Progress Intellectual Property Colloquium, Washington University School of Law in St. Louis, October 2005.
- “Patents, Prices, and Property: Drug Patents and the Takings Clause,” Works-in-Progress Intellectual Property Colloquium, Washington University School of Law in St. Louis, October 2005 (with co-author, Eric R. Claeys).
- “Patents, Prices, and Property: Drug Patents and the Takings Clause,” Health Law Scholars Workshop, St. Louis University School of Law, September 2005 (with co-author, Eric R. Claeys).
- “Patents, Prices, and Property: Drug Patents and the Takings Clause,” Intellectual Property Scholars Conference, Benjamin N. Cardozo School of Law, August 2005 (with co-author, Eric R. Claeys).
- “Patents, Prices, and Property: Drug Patents and the Takings Clause,” Loyola University Chicago School of Law, April 2005 (with co-author, Eric R. Claeys).
- “Who Cares What Thomas Jefferson Thought About Patents? Reconstructing the Origins of American Patent Doctrine.” Academic Workshop, University of Chicago Law School, November 2004.
- “Who Cares What Thomas Jefferson Thought About Patents? Reconstructing the Origins of American Patent Doctrine.” Works-in-Progress Intellectual Property Colloquium, Boston University School of Law, September 2004.
- “Who Cares What Thomas Jefferson Thought About Patents? Reconstructing the Origins of American Patent Doctrine.” Intellectual Property Scholars Conference, DePaul University College of Law, August 2004.
- “The Rise and Fall of Property Rights in America,” University of Illinois—Urbana-Champaign, April 2004.
- “Spam—Oy, It’s Such a Nuisance!,” Michigan State University—DCL College of Law, Intellectual Property Roundtable, February 2004.
- “Spam—Oy, It’s Such a Nuisance!,” Tulane Law School, Works-in-Progress Intellectual Property Colloquium, October 2003
- “The Relevance of Property Theory to Patent Law,” University of Chicago Law School, November 2002.
- “What is Property: Putting the Pieces Back Together,” Northwestern University School of Law, February 2002.
- “What is Property: Putting the Pieces Back Together,” University of Chicago Law School, February 2002.
- “The Relevance of Natural Rights in Intellectual Property Today,” The George Washington University Law School, February 2002.
- “What is Property,” Zodiac Property Law Workshop, Northwestern University School of Law, December 2001.
- “The Historical Development of the Legal Doctrine of Patents and Natural Rights Philosophy: Rediscovering Their Relationship,” Second Renaissance Conferences, July 2000.
- “Pragmatism, Justice Holmes, and Contemporary Legal Philosophy,” Harvard University, April 1999.
- “Understanding Kant’s Copernican Revolution in its Philosophical Context,” University of Michigan, November 1997.
- “Natural Law and Natural Rights: An Intellectual History,” New York City, February 1997.
- “The Nature of Individual Rights,” New York City, February 1997.
- “Natural Law and Natural Rights: An Intellectual History,” Toronto, November 1996.
- “The Nature of Individual Rights,” Toronto, November 1996.
- “The Death of Natural Law,” New York City, February 1995.