Reichman Jorgensen Lehman & Feldberg Expands with Nathan Mammen as New Partner

Nathan Mammen Joins RJLF as Partner

Reichman Jorgensen Lehman & Feldberg LLP (RJLF), a prominent name in the legal field, has announced the addition of Nathan Mammen to its ranks as a partner in the Washington, D.C. office. This strategic move underscores RJLF's commitment to strengthening its capabilities in intellectual property (IP) litigation and appellate matters.

Nathan Mammen brings over 20 years of extensive experience in handling complex intellectual property disputes, making him a significant addition to the firm. He is particularly known for his pivotal role in the landmark case of Amgen v. Sanofi, where he secured a ruling that clarified key standards for patent enablement, setting a notable precedent in patent law. His expertise spans various technological fields, including medical devices, agricultural technology, wireless communications, and semiconductor innovations.

Mammen's impressive portfolio includes representing clients at multiple levels of the judiciary, from trial courts to the U.S. Supreme Court. His extensive experience in the Federal Circuit and other appellate courts highlights his proficiency in navigating high-stakes litigation. Christine Lehman, Managing Partner of RJLF's D.C. office, praised Mammen, stating, "Nathan's ability to tackle high-stakes IP litigation with creativity and precision makes him a perfect fit for our firm. His background at both the trial and appellate levels will help us continue delivering thoughtful, effective solutions for our clients."

Outside of the courtroom, Nathan Mammen has a notable commitment to pro bono work, particularly focused on supporting his fellow veterans. His recent initiatives include representing hundreds of retired Coast Guard veterans who were unlawfully forced into retirement, achieving a significant outcome for the affected group. Reflecting on his decision to join RJLF, Mammen expressed his enthusiasm, stating, "I joined RJLF to be part of a team of exceptionally talented lawyers who are not only committed to excellence but are also genuinely good people. The opportunity to deliver the best for clients in such a dynamic and collaborative environment is unparalleled—it doesn't get any better than this."

Before his time at RJLF, Mammen was a partner at Snell & Wilmer and previously spent over a decade with Kirkland & Ellis. He also honed his skills as a clerk for the Honorable Karen J. Williams of the U.S. Court of Appeals for the Fourth Circuit. Nathan earned his Juris Doctor with honors from The George Washington University Law School, as well as a Bachelor of Science in Engineering from Purdue University.

RJLF continues to uphold its reputation as a national trial firm specializing in high-stakes commercial, intellectual property, and white-collar disputes. The firm distinguishes itself as majority women-owned, favoring innovative fee structures that align client interests over traditional billable hours. With offices in major cities including Silicon Valley, New York, Washington, D.C., Austin, and Atlanta, RJLF's attorneys are known for their diverse backgrounds and exceptional credentials, committed to trial advocacy.

For further details about RJLF and its insights into the realm of intellectual property law, interested parties can visit reichmanjorgensen.com.