The Team

David M. Lilenfeld, Esq.

David M. Lilenfeld is an intellectual property and business lawyer and the founder of Lilenfeld PC in Atlanta. He represents clients in business disputes and intellectual property issues involving trademarks, copyrights, patents and trade secrets.

David is a graduate of Hunter College with a B.A. in philosophy. He earned his J.D. at The Ohio State University Moritz College of Law in 1996 where he was a member of The Ohio State Law Journal.

David Lilenfeld has been selected by his peers as one of Georgia Trend’s 2012 Legal Elite in Intellectual Property and for inclusion in Super Lawyers from 2014 through 2020 for Intellectual Property Litigation, a recognition reserved for only 5 percent of practicing attorneys. David was also chosen as a Rising Star in 2009 and 2010 by Georgia Super Lawyers, which recognizes the best up-and-coming attorneys in the state. He currently serves as Co-Chair of the Litigation Committee of the Intellectual Property Section of the Georgia Bar and of the Emerging Issues Committee (North America) of the International Trademark Association (INTA). David Lilenfeld has previously served as the Chair of the Small Firm Section of the Atlanta Bar Association and the chairperson of the Litigation Committee of the Technology Law section of the State Bar of Georgia.

A trusted resource for the media on intellectual property and business litigation, David has been published in The Atlanta Journal-Constitution, Atlanta Business Chronicle, and other business and legal outlets. See these articles and interviews.

At business meetings and conferences, David Lilenfeld speaks on intellectual property law and business litigation. These presentations include:

David lives in the Buckhead area of Atlanta with his two young sons. In his rare spare time, David boxes and plays competitive tennis and chess.


Robin L. Gentry, Esq.

Robin L. Gentry practice focuses on complex litigation with an emphasis on intellectual property. She has extensive experience having litigated hundreds of cases in federal and state trial and appellate courts.

Robin is a graduate of Western Michigan University with a B.A. in anthropology. She earned her J.D. at Wayne State University of Law in 2001 where she graduated magna cum laude and was a member of The Wayne State Law Review and Moot Court.

Ms. Gentry experience includes both prosecuting and defending many patent actions involving a wide spectrum of technologies and industries, including medical devices, pharmaceuticals, antimicrobial agents, electronic programming guides, hand-held electronic devices, incentive reward programs, avionics, vehicular telematics, and commercial floor coverings. Ms. Gentry also practices in the copyright field, including cases involving the useful article doctrine and the fair use doctrine. Ms. Gentry’s trademark experience includes cases involving major public universities as well as small businesses and individuals. Ms. Gentry is involved in all aspects of litigation, at both the trial and appellate level, including pretrial preparation, trial work and has extensive trial and appellate level writing experience. She has also represented clients in arbitration proceedings and successfully resolved disputes through mediation. Additionally, Ms. Gentry has litigated Section 337 actions before the International Trade Commission and regularly litigates copyright, trade secret, domain name, trade dress and trademark cases (including opposition and cancellation proceedings in the Trademark Office). Ms. Gentry’s intellectual property practice also includes anti-piracy litigation for satellite television providers and the motion picture industry. Ms. Gentry is admitted to practice in Georgia and in a variety of federal courts across the nation.


Kennington R. Groff, Esq.

Attorney Kennington Groff is a native of Atlanta, having grown up in the Johns Creek area. She earned her dual undergraduate degree in Public Relations and Spanish from the University of Georgia in 2014 and her law degree from Pepperdine in 2017. During law school, Kennington earned three certificates: Palmer Center for Entrepreneurship and the Law; Entertainment, Media, and Sports Law; Straus Institute for Dispute Resolution.

Throughout law school, Kennington gained valuable experience working with top entertainment executives at HBO, NBCUniversal, and Lionsgate in their business and legal affairs offices in Los Angeles and New York City. Kennington served as the President of the Sports and Entertainment Law Society her final year of law school.

After graduating law school, Kennington launched her own firm and worked closely with veteran entertainment attorney Beth B. Moore before joining Lilenfeld PC. In addition to her legal work, Kennington worked as a Clips Producer on Season 4 of Weather Gone Viral for The Weather Channel.

Kennington currently resides in Atlanta. She enjoys traveling, playing basketball and supporting local Atlanta restaurants.


Marie Sussenbach – Paralegal

Marie Sussenbach works with Lilenfeld PC as their Paralegal, supporting all attorneys within the firm. Marie has worked as a Paralegal for many years and has always focused on litigation.

An alumna of Kennesaw State University, Marie has her bachelor’s degree in Health and Human Services and a minor in Chemistry. Contemplating law school after graduation, Marie went on to earn her Paralegal Certificate from Kennesaw State University by completing their 12-month program and began working as a paralegal in 2014. In Fall of 2016, Marie started law school at Atlanta’s John Marshall Law School and has an anticipated graduation date of May 2020. Marie has served on the Law Journal editorial board since 2017 and was elected to serve as the Editor in Chief of the Law Journal for the 2019-2020 academic year. She is currently working on her second piece for publication, which is focused on insurance coverage for data breach claims under CGL policies.

Marie currently resides in Smyrna, Georgia with her husband and their five dogs. Marie loves spending time at the lake, attending Braves games, and traveling with her husband.


Angela Rosenthal – Legal Assistant

Angela Rosenthal is a Legal Assistant with Lilenfeld PC earning a bachelor’s degree in business management in 2010. She brings a wealth of customer/client relations experience having previously worked with major corporations in Cox Media Group and Walt Disney World Company.

Angela supports the Lilenfeld Team with managing accounts payables/receivables, assisting in the preparation of client case work and tracking/maintaining all client Trademark, Copyright and Patents.

Angela currently resides in Alpharetta, Georgia with her husband and their two sons. Outside of work, she enjoys staying active and can be seen cheering on her boys at the Lacrosse field and Basketball court.