17 Patterson Belknap Attorneys and Six Practices Receive Recognition in Chambers USA 2023

June, 2023 - New York, New York

Patterson Belknap Webb & Tyler LLP is pleased to announce that six of our practice areas and seventeen of our partners and counsel received recognition in the newly released Chambers USA – America’s Leading Lawyers for Business 2023.

Chambers rankings are based on extensive research and interviews with peers and clients around the country. The qualities assessed include technical legal ability, professional conduct, client service, commercial awareness/astuteness, diligence, commitment, and other qualities most valued by the client.

The following firm practices were recognized:

  • Advertising: Litigation – National
  • Intellectual Property: Patent – New York
  • Intellectual Property: Trademark, Copyright & Trade Secrets – New York
  • Litigation: Securities: Institutional Plaintiffs – Mainly RMBS Litigation – New York
  • Litigation: White-Collar Crime & Government Investigations – New York
  • Real Estate: Mainly Dirt – New York

In addition, the following partners and counsel were recognized:

  • Michael Buchanan in Litigation: White-Collar Crime & Government Investigations – New York
  • William F. Cavanaugh, Jr. in Intellectual Property: Patent – New York
  • Gregory L. Diskant in Intellectual Property: Patent – New York
  • Joshua A. Goldberg in Litigation: White-Collar Crime & Government Investigations – New York
  • Andrew L. Herz in Real Estate – New York
  • Joshua Kipnees in Advertising: Litigation – National
  • Robert P. LoBue in Intellectual Property: Trademark, Copyright & Trade Secrets – New York
  • Hope Plasha in Real Estate – New York
  • Lewis V. Popovski in Intellectual Property: Patent – New York
  • Geoffrey Potter in Intellectual Property: Trademark, Copyright & Trade Secrets – New York
  • Daniel S. Ruzumna in Litigation: White-Collar Crime & Government Investigations – New York
  • Harry Sandick in Litigation: White-Collar Crime & Government Investigations – New York
  • Saul B. Shapiro in Media & Entertainment: Litigation – New York
  • Stephanie Teplin in Litigation: Securities: Institutional Plaintiffs – Mainly RMBS Litigation – New York
  • Peter Tomlinson in Litigation: Securities: Institutional Plaintiffs – Mainly RMBS Litigation – New York
  • John D. Winter in Product Liability & Mass Torts – National
  • Steven A. Zalesin in Advertising: Litigation – National

Comments regarding the firm from the Chambers USA 2023 guide include:


“Remains a go-to firm for high-stakes advertising litigation. The firm is particularly noted for representing leading brands in false advertising disputes, with a strong capability in handling cases that go to trial. It also possesses a nationwide practice in the defense of consumer class actions. The team is particularly active on behalf of clients in the food and drink industry.”

Sources Say: “They are very sophisticated legally and devise and execute winning strategies.”

“Another source adds: ‘They provide a very good service to clients in terms of the quality of their advice and how responsive they are’."


“Steven Zalesin is a renowned litigator with a particular focus on advertising disputes, and is described by clients as ‘an extremely smart lawyer who understands what we prioritize.’ One client notes that he is ‘one of the top advertising litigators in the country’ and an ‘all-around top lawyer’.”

“Joshua Kipnees is a highly-sought after litigator in the advertising space. Joshua receives high praise from clients who say he ‘is a very high level strategic and tactical thinker who provides practical advice’ and another who states ‘he never steers me wrong with his unsurpassed instincts and mastery of the law’.”


“Draws acclaim for its strong offering across the patent, trademark and copyright spaces. Possesses strength and depth in a number of areas including pharmaceuticals and biosimilars, boasting an impressive client roster of market-leading clients.”

Sources Say: “They far exceed many other firms in their commitment to client service.”

“With another adding: ‘The Patterson case teams are run by partners with deep experience in IP work, backed by a team of talented associates’.”


“William Cavanaugh is a well-known trial lawyer distinguished by his expertise in patent disputes arising in the life sciences sector. His broad practice includes Hatch-Waxman litigation and patent assertion. He is lauded by clients as being ‘fantastic’ and ‘an all-around excellent litigator’.”

“Gregory Diskant is an esteemed patent litigator with substantial experience litigating high-value patent disputes. He has particular expertise in the medical device and pharmaceutical space and he has a noted track record in Hatch-Waxman cases.”

“Robert LoBue combines his substantial trademark and copyright experience with expertise in First Amendment matters. He regularly handles matters for major publishers. He is well-regarded by clients as a ‘trusted advisor and a skilled litigator’.”

“Lewis Popovski acts for notable clients in the technology sector and draws praise for his work litigating patent infringement disputes. A client notes ‘he is very responsive, delivers great results, and has a strong client service focus,’ while another adds ‘he has a wealth of experience and knowledge’.”

“Geoffrey Potter is well-known for his work in the anticounterfeiting space, frequently representing clients in industries including pharmaceuticals, food and beverages and consumer goods. Clients describe Geoffrey as a ‘tenacious litigator who sees the big picture and is able to drill down to the details.’ Another client states that Geoffrey ‘delivers excellent results and is a true expert in the field’.”


“Go-to RMBS litigation practice that remains a top choice for institutional plaintiffs. The firm regularly acts for monoline insurers in high-value actions brought against financial institutions, with a strong track record of securing multimillion-dollar settlements. It leverages notable expertise in corporate and real estate matters when advising on securities disputes.”


“Stephanie Teplin represents financial guarantors, hedge funds and other institutional investors in claims for fraud, breach of contract and fiduciary duty arising from RMBS and other securities-related transactions.”

“Peter Tomlinson handles a range of RMBS and complex financial product litigation. He acts for a number of major bond insurers as well as institutional investors.”


“Longstanding New York-based firm with a solid presence in the white-collar defense sphere. Sports former high-ranking DOJ officials and distinguished former prosecutors in its ranks. Called on by both individuals and corporate clients to guide them through complex regulatory investigations and enforcement proceedings by bodies such as the DOJ, SEC and CFTC.”

Sources Say:

“The Patterson team ‘is very agile in its ability to address large and small matters. They have a practical approach to handling matters’.”

“Another source adds ‘Patterson has highly experienced and skilled attorneys relative to the matters being handled’.”


“Michael Buchanan handles a range of white-collar matters involving securities, insider trading, tax, accounting and healthcare fraud. Also noted for his expert handling of patent litigation and cybersecurity matters. According to a client, he ‘brings great legal acumen to the table in a very practical matter’.”

“Joshua Goldberg cochairs the firm's white-collar group, and is widely praised for his work representing clients in litigation involving allegations such as fraud, insider trading and RICO violations. Interviewees say he ‘is a steady, experienced lawyer who is able to assess a situation appropriately and strategically think through the process.’ Another client notes that he is ‘a superb lawyer with excellent judgment and intelligence. He is a joy to work with’.”

“Dan Ruzumna is cochair of the firm's white-collar department and acts for an array of individual and corporate clients seeking representation in complex criminal proceedings and investigations involving fraud, asset forfeiture and antitrust issues, among others. Clients commend him for being ‘a pleasure to work with and is adept at handling complex government investigations.’ Another interviewee says he is ‘incredibly smart, attentive and always thinks outside the box’.”

“Harry Sandick has a wealth of experience handling criminal investigations on behalf of both individual and corporate clients, including matters with cross-border complexities. A client applauds his responsiveness and his ‘sophisticated understanding of relevant law and an ability to easily communicate complex legal issues’."


“Saul Shapiro is chair of Patterson Belknap Webb & Tyler's media and entertainment team. He handles a broad range of disputes at the trial and appellate levels. Saul is ‘very strategic, practical and has a great amount of experience’.”


“John Winter is a seasoned practitioner who frequently represents major multinational companies on pharmaceutical and medical device MDLs, with further experience in toxic torts.”


“A highly regarded leasing practice, regularly engaged by major tenants and landlords for complex transactions. The team is also proficient in the financing, acquisition and disposition of high-value real estate assets.”

Sources Say:

“Patterson Belknap ‘handle extremely complex real estate transactions and provide practice legal and business advice,’ ‘has an amazing depth of knowledge,’ and ‘has incredible capacity to not only think through complex legal issues, but also to address them in the context of corporate structure’.”


“Andrew Herz operates a broad-based commercial real estate practice advising corporate clients on acquisition, development and leasing transactions and clients call him ‘a very good leasing lawyer’.”

“Hope Plasha enjoys a national practice that covers a full spectrum of property types. She provides high-level advice on such issues as commercial leasing, acquisitions and dispositions. She is praised by clients for bringing ‘a level of knowledge, expertise, service, pragmatism and common sense that is rare, exceptional and highly valued,’ as well as bringing ‘not only a level of rigor and intellect to her work but she is aware of the New York City real estate market’.”