Director, Robert A. Levy Center for Constitutional Studies, Cato Institute
Thomas Berry is the director in the Cato Institute’s Robert A. Levy Center for Constitutional Studies and editor in chief of the Cato Supreme Court Review. Before joining Cato, he was an attorney at Pacific Legal Foundation and clerked for Judge E. Grady Jolly of the U.S. Court of Appeals for the Fifth Circuit. His academic work has appeared in NYU Journal of Law and Liberty, Washington and Lee Law Review Online, and Federalist Society Review. His popular writing has appeared in The Wall Street Journal, National Law Journal, Investor’s Business Daily, National Review Online, and The Hill Online. He has testified before the U.S. Senate, and his work has been cited by the U.S. District Court for the District of Columbia.
Berry holds a J.D. from Stanford Law School, where he was a senior editor on the Stanford Law and Policy Review and a Bradley Student Fellow in the Stanford Constitutional Law Center. He graduated with a B.A. in Liberal Arts from St. John’s College, Santa Fe.
Senior Counsel, Litigation, Defense of Freedom Institute
Don Daugherty is Senior Counsel, Litigation, at the Defense of Freedom Institute for Policy Studies. He previously served as a Senior Counsel at the Institute for Free Speech and the Wisconsin Institute for Law & Liberty. Before that, he was a partner at three of Wisconsin’s largest firms, with nearly 30 years of trial and appellate litigation experience. He has been consistently recognized as among the “Best Lawyers in America,” as well as Wisconsin’s “Super Lawyers.” He received his B.A. from the University of Virginia and his J.D. from Northwestern University Law School. After law school, he served as a clerk to the Honorable Roger J. Miner of the United States Court of Appeals for the Second Circuit.
Don is on the Board of Advisors for the Milwaukee Lawyers’ Chapter of the Federalist Society, and on the Executive Committee of the Federalist Society’s Litigation Practice Group.
Lyle T. Alverson Professor of Law, George Washington University Law School
Professor Pierce is author of over twenty books and 130 articles on administrative law, government regulation, and the effects of various forms of government intervention on the performance of markets. His books and articles have been cited in hundreds of judicial opinions, including over a dozen opinions of the U.S. Supreme Court.
Judge, U.S. Court of Appeals for the Third Circuit
Hon. Jennifer Mascott served as Associate Professor of Law and Director of the Separation of Powers Institute at The Catholic University of America’s Columbus School of Law before her appointment to the federal bench. On July 16, 2025, President Donald J. Trump nominated her to the U.S. Court of Appeals for the Third Circuit (Delaware), and she was confirmed on October 9, 2025.
Prior to her confirmation, Judge Mascott wrote extensively in administrative and constitutional law, statutory interpretation, and the separation of powers. Her scholarship—published in leading journals including the Stanford Law Review, Notre Dame Law Review, and Supreme Court Review—was cited by the U.S. Supreme Court and multiple federal courts. She also contributed Supreme Court commentary for NBC Universal.
Before joining Catholic Law, she was an Assistant Professor and Co-Director of The C. Boyden Gray Center at George Mason University’s Antonin Scalia Law School. In 2022 she became co-author of Beermann, Cass & Diver’s Administrative Law: Cases and Materials (9th ed.). In 2023 she received the Justice Joseph Story Award for excellence in scholarship, teaching, and advancing the rule of law.
Judge Mascott also served as a Council Member of the ABA’s Administrative Law Section and as a Public Member of the Administrative Conference of the United States. She frequently testified before Congress on executive power, regulatory reform, and judicial jurisdiction, and participated in multiple Supreme Court confirmation hearings.
From 2019 to 2021, she took leave from academia to serve as Deputy Assistant Attorney General in the Department of Justice’s Office of Legal Counsel and later as Associate Deputy Attorney General, where she argued federal cases and assisted with Justice Amy Coney Barrett’s confirmation. Earlier in her career, she clerked for Justice Clarence Thomas and for then-Judge Brett M. Kavanaugh on the D.C. Circuit.
Judge Mascott earned her J.D. summa cum laude from the George Washington University Law School and her B.A. from the same institution.
Professor of Law, University of Baltimore School of Law (on leave); Senior Counsel, U.S. Department of Justice
Professor Dolin’s scholarship centers on patent law with a specific focus on how the patent regime affects innovation, especially in bio-pharmaceutical areas. His work in these areas includes a number of scholarly articles, presentations, amicus briefs, and congressional testimony.
Dr. Dolin is currently on leave from his academic duties while he serves as Senior Counsel in the Civil Rights Division of the United States Department of Justice.
From January 2020 to January 2022, Professor Dolin served as a resident Associate Justice of the Supreme Court of the Republic of Palau. In this role, he (together with other members of the Court) heard appeals in civil, criminal, administrative, and constitutional law matters.
Prior to joining the University of Baltimore School of Law, Professor Dolin held visiting appointments in other law schools. He also served as a law clerk to the Hon. Pauline Newman, of the U.S. Court of Appeals for the Federal Circuit and the late Hon. H. Emory Widener Jr., of the U.S. Court of Appeals for the Fourth Circuit.
Rumors that he has a real Russian bear in his office are entirely true.
Associate Professor of Law, George Washington University Law School
Dmitry Karshtedt's primary research interest is in patent law. His legal scholarship has been published in the Vanderbilt Law Review, Washington University Law Review, and Iowa Law Review, among other outlets, and cited in three of the leading patent law casebooks, a casebook on intellectual property, and three treatises. Professor Karshtedt's academic work has won several awards, including the Samsung-Stanford Patent Prize and the scholarship grant for judicial clerks sponsored by the University of Houston Law Center Institute for Intellectual Property and Information Law.
Associate Dean for Academic Affairs, Austin E. Owen Research Scholar & Professor of Law, The University of Richmond School of Law
Dean Kristen Jakobsen Osenga teaches and writes in the areas of patent law, antitrust, and legislation and regulation. Some of her recent scholarship focuses on standard development organizations, patent eligible subject matter, patent licensing firms, litigation and remedies for patent infringement, and patent law reform. She has written numerous law review articles on these and other topics, as well as book chapters and op eds on various aspects of patent law. Additionally, she has spoken on these issues at many academic conferences and bar events. Dean Osenga is Chief Policy Counselor for the Inventors Defense Alliance, as well as an active member of the Federal Circuit Bar Association and the American Intellectual Property Law Association.
Dean Osenga received a B.S. degree in Biomedical Engineering from the University of Iowa, an M.S. degree in Electrical Engineering from Southern Illinois University – Carbondale, and a J.D. from the University of Illinois College of Law, where she graduated magna cum laude. After law school, she practiced at the law firm of Finnegan, Henderson, Farabow, Garrett, & Dunner LLP, (now Finnegan) where she did patent prosecution and litigation. She then clerked for the Judge Richard Linn of the U.S. Court of Appeals for the Federal Circuit. After clerking, she entered academia, teaching first at Chicago-Kent College of Law and then at the University of Richmond, where she has been since 2006. She has also been a Visiting Professor at Emory University School of Law and at William & Mary School of Law.
Judge, U.S. Court of Appeals for the Third Circuit
Hon. Jennifer Mascott served as Associate Professor of Law and Director of the Separation of Powers Institute at The Catholic University of America’s Columbus School of Law before her appointment to the federal bench. On July 16, 2025, President Donald J. Trump nominated her to the U.S. Court of Appeals for the Third Circuit (Delaware), and she was confirmed on October 9, 2025.
Prior to her confirmation, Judge Mascott wrote extensively in administrative and constitutional law, statutory interpretation, and the separation of powers. Her scholarship—published in leading journals including the Stanford Law Review, Notre Dame Law Review, and Supreme Court Review—was cited by the U.S. Supreme Court and multiple federal courts. She also contributed Supreme Court commentary for NBC Universal.
Before joining Catholic Law, she was an Assistant Professor and Co-Director of The C. Boyden Gray Center at George Mason University’s Antonin Scalia Law School. In 2022 she became co-author of Beermann, Cass & Diver’s Administrative Law: Cases and Materials (9th ed.). In 2023 she received the Justice Joseph Story Award for excellence in scholarship, teaching, and advancing the rule of law.
Judge Mascott also served as a Council Member of the ABA’s Administrative Law Section and as a Public Member of the Administrative Conference of the United States. She frequently testified before Congress on executive power, regulatory reform, and judicial jurisdiction, and participated in multiple Supreme Court confirmation hearings.
From 2019 to 2021, she took leave from academia to serve as Deputy Assistant Attorney General in the Department of Justice’s Office of Legal Counsel and later as Associate Deputy Attorney General, where she argued federal cases and assisted with Justice Amy Coney Barrett’s confirmation. Earlier in her career, she clerked for Justice Clarence Thomas and for then-Judge Brett M. Kavanaugh on the D.C. Circuit.
Judge Mascott earned her J.D. summa cum laude from the George Washington University Law School and her B.A. from the same institution.
Lyle T. Alverson Professor of Law, George Washington University Law School
Professor Pierce is author of over twenty books and 130 articles on administrative law, government regulation, and the effects of various forms of government intervention on the performance of markets. His books and articles have been cited in hundreds of judicial opinions, including over a dozen opinions of the U.S. Supreme Court.
Professor of Law, University of Baltimore School of Law (on leave); Senior Counsel, U.S. Department of Justice
Professor Dolin’s scholarship centers on patent law with a specific focus on how the patent regime affects innovation, especially in bio-pharmaceutical areas. His work in these areas includes a number of scholarly articles, presentations, amicus briefs, and congressional testimony.
Dr. Dolin is currently on leave from his academic duties while he serves as Senior Counsel in the Civil Rights Division of the United States Department of Justice.
From January 2020 to January 2022, Professor Dolin served as a resident Associate Justice of the Supreme Court of the Republic of Palau. In this role, he (together with other members of the Court) heard appeals in civil, criminal, administrative, and constitutional law matters.
Prior to joining the University of Baltimore School of Law, Professor Dolin held visiting appointments in other law schools. He also served as a law clerk to the Hon. Pauline Newman, of the U.S. Court of Appeals for the Federal Circuit and the late Hon. H. Emory Widener Jr., of the U.S. Court of Appeals for the Fourth Circuit.
Rumors that he has a real Russian bear in his office are entirely true.
Associate Professor of Law, George Washington University Law School
Dmitry Karshtedt's primary research interest is in patent law. His legal scholarship has been published in the Vanderbilt Law Review, Washington University Law Review, and Iowa Law Review, among other outlets, and cited in three of the leading patent law casebooks, a casebook on intellectual property, and three treatises. Professor Karshtedt's academic work has won several awards, including the Samsung-Stanford Patent Prize and the scholarship grant for judicial clerks sponsored by the University of Houston Law Center Institute for Intellectual Property and Information Law.
Associate Dean for Academic Affairs, Austin E. Owen Research Scholar & Professor of Law, The University of Richmond School of Law
Dean Kristen Jakobsen Osenga teaches and writes in the areas of patent law, antitrust, and legislation and regulation. Some of her recent scholarship focuses on standard development organizations, patent eligible subject matter, patent licensing firms, litigation and remedies for patent infringement, and patent law reform. She has written numerous law review articles on these and other topics, as well as book chapters and op eds on various aspects of patent law. Additionally, she has spoken on these issues at many academic conferences and bar events. Dean Osenga is Chief Policy Counselor for the Inventors Defense Alliance, as well as an active member of the Federal Circuit Bar Association and the American Intellectual Property Law Association.
Dean Osenga received a B.S. degree in Biomedical Engineering from the University of Iowa, an M.S. degree in Electrical Engineering from Southern Illinois University – Carbondale, and a J.D. from the University of Illinois College of Law, where she graduated magna cum laude. After law school, she practiced at the law firm of Finnegan, Henderson, Farabow, Garrett, & Dunner LLP, (now Finnegan) where she did patent prosecution and litigation. She then clerked for the Judge Richard Linn of the U.S. Court of Appeals for the Federal Circuit. After clerking, she entered academia, teaching first at Chicago-Kent College of Law and then at the University of Richmond, where she has been since 2006. She has also been a Visiting Professor at Emory University School of Law and at William & Mary School of Law.
Judge, U.S. Court of Appeals for the Third Circuit
Hon. Jennifer Mascott served as Associate Professor of Law and Director of the Separation of Powers Institute at The Catholic University of America’s Columbus School of Law before her appointment to the federal bench. On July 16, 2025, President Donald J. Trump nominated her to the U.S. Court of Appeals for the Third Circuit (Delaware), and she was confirmed on October 9, 2025.
Prior to her confirmation, Judge Mascott wrote extensively in administrative and constitutional law, statutory interpretation, and the separation of powers. Her scholarship—published in leading journals including the Stanford Law Review, Notre Dame Law Review, and Supreme Court Review—was cited by the U.S. Supreme Court and multiple federal courts. She also contributed Supreme Court commentary for NBC Universal.
Before joining Catholic Law, she was an Assistant Professor and Co-Director of The C. Boyden Gray Center at George Mason University’s Antonin Scalia Law School. In 2022 she became co-author of Beermann, Cass & Diver’s Administrative Law: Cases and Materials (9th ed.). In 2023 she received the Justice Joseph Story Award for excellence in scholarship, teaching, and advancing the rule of law.
Judge Mascott also served as a Council Member of the ABA’s Administrative Law Section and as a Public Member of the Administrative Conference of the United States. She frequently testified before Congress on executive power, regulatory reform, and judicial jurisdiction, and participated in multiple Supreme Court confirmation hearings.
From 2019 to 2021, she took leave from academia to serve as Deputy Assistant Attorney General in the Department of Justice’s Office of Legal Counsel and later as Associate Deputy Attorney General, where she argued federal cases and assisted with Justice Amy Coney Barrett’s confirmation. Earlier in her career, she clerked for Justice Clarence Thomas and for then-Judge Brett M. Kavanaugh on the D.C. Circuit.
Judge Mascott earned her J.D. summa cum laude from the George Washington University Law School and her B.A. from the same institution.
Lyle T. Alverson Professor of Law, George Washington University Law School
Professor Pierce is author of over twenty books and 130 articles on administrative law, government regulation, and the effects of various forms of government intervention on the performance of markets. His books and articles have been cited in hundreds of judicial opinions, including over a dozen opinions of the U.S. Supreme Court.
Professor of Law, University of Baltimore School of Law (on leave); Senior Counsel, U.S. Department of Justice
Professor Dolin’s scholarship centers on patent law with a specific focus on how the patent regime affects innovation, especially in bio-pharmaceutical areas. His work in these areas includes a number of scholarly articles, presentations, amicus briefs, and congressional testimony.
Dr. Dolin is currently on leave from his academic duties while he serves as Senior Counsel in the Civil Rights Division of the United States Department of Justice.
From January 2020 to January 2022, Professor Dolin served as a resident Associate Justice of the Supreme Court of the Republic of Palau. In this role, he (together with other members of the Court) heard appeals in civil, criminal, administrative, and constitutional law matters.
Prior to joining the University of Baltimore School of Law, Professor Dolin held visiting appointments in other law schools. He also served as a law clerk to the Hon. Pauline Newman, of the U.S. Court of Appeals for the Federal Circuit and the late Hon. H. Emory Widener Jr., of the U.S. Court of Appeals for the Fourth Circuit.
Rumors that he has a real Russian bear in his office are entirely true.
Associate Professor of Law, George Washington University Law School
Dmitry Karshtedt's primary research interest is in patent law. His legal scholarship has been published in the Vanderbilt Law Review, Washington University Law Review, and Iowa Law Review, among other outlets, and cited in three of the leading patent law casebooks, a casebook on intellectual property, and three treatises. Professor Karshtedt's academic work has won several awards, including the Samsung-Stanford Patent Prize and the scholarship grant for judicial clerks sponsored by the University of Houston Law Center Institute for Intellectual Property and Information Law.
Associate Dean for Academic Affairs, Austin E. Owen Research Scholar & Professor of Law, The University of Richmond School of Law
Dean Kristen Jakobsen Osenga teaches and writes in the areas of patent law, antitrust, and legislation and regulation. Some of her recent scholarship focuses on standard development organizations, patent eligible subject matter, patent licensing firms, litigation and remedies for patent infringement, and patent law reform. She has written numerous law review articles on these and other topics, as well as book chapters and op eds on various aspects of patent law. Additionally, she has spoken on these issues at many academic conferences and bar events. Dean Osenga is Chief Policy Counselor for the Inventors Defense Alliance, as well as an active member of the Federal Circuit Bar Association and the American Intellectual Property Law Association.
Dean Osenga received a B.S. degree in Biomedical Engineering from the University of Iowa, an M.S. degree in Electrical Engineering from Southern Illinois University – Carbondale, and a J.D. from the University of Illinois College of Law, where she graduated magna cum laude. After law school, she practiced at the law firm of Finnegan, Henderson, Farabow, Garrett, & Dunner LLP, (now Finnegan) where she did patent prosecution and litigation. She then clerked for the Judge Richard Linn of the U.S. Court of Appeals for the Federal Circuit. After clerking, she entered academia, teaching first at Chicago-Kent College of Law and then at the University of Richmond, where she has been since 2006. She has also been a Visiting Professor at Emory University School of Law and at William & Mary School of Law.
Carr v. Saul - Post-Decision SCOTUScast
Thomas Berry
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Donald A. Daugherty
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Richard J. Pierce, Jenn L. Mascott
On March 3, 2021, the Supreme Court will hear oral arguments in Carr v. Saul. The...
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Gregory Dolin, Dmitry Karshtedt, Kristen Osenga
The U.S. Supreme Court heard oral arguments in United States v. Arthrex Inc. on March 1,...
Courthouse Steps Oral Argument Teleforum: Carr v. Saul
Jenn L. Mascott, Richard J. Pierce
On March 3, 2021, the Supreme Court will hear oral arguments in Carr v. Saul. This...
Courthouse Steps Oral Argument Webinar: United States v. Arthrex Inc.
Gregory Dolin, Dmitry Karshtedt, Kristen Osenga
The U.S. Supreme Court will hear oral argument in United States v. Arthrex Inc. on March...
Courthouse Steps Oral Argument Teleforum: Carr v. Saul
TeleforumCourthouse Steps Oral Argument Webinar: United States v. Arthrex Inc.
TeleforumTopics
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Since 2011, federal law has permitted those seeking to challenge the validity of patents...
Topics
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On March 3, the Supreme Court will hear oral arguments in Carr v. Saul—a case...