Chicago
Patrick Zanayed represents private equity funds, digital health companies, strategic investors, ambulatory surgery centers, behavioral health facilities, senior care facilities, physician practices, and dental practices in a variety of transactional and regulatory matters. He also has deep experience advising on pharma services, clinical research, and health technology transactions.
- Assisted in the sale for $30 million of a medical department of a major non-profit university system to a large private corporation
- Assisted in the acquisition of a dental platform for $100 million by a private equity fund requiring the coordination of over 30 locations and teams
- Assisted counsel on the $70 million acquisition of a speech therapy platform by a private equity backed platform company
- Best Lawyers: Ones to Watch in America, Healthcare Law, 2022-2026
- Teacher for Lawyers in the Classroom
- University of Illinois College of Law, JD, magna cum laude
- Northwestern University, BA, Economics and International Studies
- Illinois
- English
- Arabic
Dr. Christian L. Masch
Munich
Dr. Christian Masch advises clients on telecommunications, media and technology (TMT). He has longstanding experience in the fields of copyright, patent and data protection law. In complex international projects, he advises inter alia on data protection law.
As an experienced litigator, he frequently and successfully represents DAX and international companies – especially in the areas of media, information technology, intellectual property and corporate law – in state court proceedings, as well as in arbitrations.
Christian is the author of numerous publications in the business press and legal journals.
Christian advised:
- Main Capital on the Acquisition of a Majority Stake in Buchner & Camp Partner
- A leading private broadcasting station in a legal proceeding before the European Court of Justice regarding the German law ban on regional advertising in TV programs
- A leading German advertising marketer in a legal proceeding against the provider of ad-blocking software (a browser extension suppressing Internet ads)
- A leading company in the tourism industry in a legal proceeding against a consumer organization regarding the sale and transfer of the customer database
- Handelsblatt/Best Lawyers™, Germany: Media Law, 2026-2027
- JUVE Handbook of Commercial Law Firms, Recommended: Media: Regulation and Contract and Copyright Law, 2022-2026
- The Legal 500 EMEA, Recommended, Germany: Media: Entertainment, IT Transactions and Outsourcing, and IT and Digitalization, 2022-2024
- Universities of Augsburg and Dresden, Dr. jur.
- Higher Regional Court of Munich, Second State Exam
- University of Passau, First State Exam
- Germany
- English
- German
Ian B. Brooks
Washington, DC
Ian B. Brooks represents clients in complex patent disputes – leading teams at all stages of litigation. Ian’s experience includes patent matters involving computer, wireless communication, semiconductor fabrication, chemicals, and pharmaceutical technologies in district courts, the Patent Trial and Appeal Board, the International Trade Commission, and the Court of Federal Claims. Ian has also litigated trade secrets, trademark, and copyright cases, and advised clients in intellectual property transactions. Ian represents a broad range of organizations from startups to Fortune 500 companies.
- Represented K-fee in an 11-patent dispute against Nespresso that spanned the district court, the PTAB, and the Court of Appeals for the Federal Circuit, obtaining favorable resolution (K-fee System GmbH v. Nespresso USA, Inc.)
- Successfully obtained complete and favorable jury verdict in favor of Next Caller on claims of trade secrets misappropriation, international interference with perspective business relations, and breach of contract (TRUSTID, Inc. v. Next Caller Inc.)
- Obtained jury verdict of non-infringement of three patents in favor of Next Caller (TRUSTID, Inc. v. Next Caller Inc.)
- Obtained favorable settlements on behalf of Bausch Health in Hatch-Waxman litigation involving the assertion of twelve patents against 19 generic ANDA filers (In re Jublia)
- Represented Solta Medical in assertion of laser-based medical device patents against Lumenis (Solta Medical, Inc. v. Lumenis, Inc. et al.)
- Best Lawyers: Ones to Watch in America, Litigation – Intellectual Property (2024-2027), Litigation – Patent, 2026-2027
- Washington, DC Super Lawyers “Rising Star,” 2018-2021
- The Legal 500 US 2019
- Harvard Law School, JD
- Johns Hopkins University, MS, Electrical Engineering
- University of Maryland, BS, Electrical Engineering
- District of Columbia
- Maryland
- Supreme Court of the United States
- US Court of Appeals for the Federal Circuit
- US District Court for the District of Columbia
- US Court of Federal Claims
- US Court of Appeals for Veterans Claims
- US Patent and Trademark Office
- US District Court for the District of Colorado
- US District Court for the Eastern District of Wisconsin
- English
Annette Keller
Munich
Annette Keller advises clients on international tax law, tax audits as well as tax litigation before tax courts and the German Supreme Tax Court (Bundesfinanzhof), tax structuring, group reorganizations and group tax law.
As a licensed tax specialist (Fachanwalt für Steuerrecht) she is a regular author and speaker on tax issues, in particular at conferences on international tax law.
She is an officer of the Taxes Committee of the International Bar Association.
Annette advised:
- US-based multinational group in the reorganization of the group structure, the financing structure and the post-acquisition integration of German companies
- US-based multinational group in a joint audit on transfer pricing after a reorganization
- Multinational group in a tax audit and before the fiscal court on transfer pricing issues related to intangibles
- Handelsblatt/Best Lawyers™, Germany: Tax Law, 2025-2027
- International Bar Association
- International Fiscal Association
- Licensed Tax Specialist
- Higher Regional Court of Bamberg, Second State Exam
- University of Würzburg, First State Exam
- Germany
- English
- German
Daniel J. Bell
Washington, DC
Daniel (Danny) J. Bell focuses his practice on domestic and international estate, gift and income tax planning. He has assisted clients with cutting-edge estate, income and gift tax mitigation strategies, including domestic and offshore tax compliance, tax controversy and litigation, pre-immigration, expatriation and business succession planning, estate and trust administration, as well as family multigenerational wealth preservation. Danny has also advised high-net-worth individuals with sophisticated tax and wealth transfer planning and implementation.
- District of Columbia Courts, Capital Pro Bono Honor Roll, 2023
- Super Lawyers Rising Star, Washington D.C., 2019
- American Bar Association, Tax Section
- Georgetown University Law Center, LLM, with distinction
- William & Mary Law School, JD, cum laude
- Elon University, BS, summa cum laude
- District of Columbia
- Virginia
- US Tax Court
- Supreme Court of Virginia
Lowell D. Yoder
Chicago
Lowell D. Yoder focuses his practice on cross-border mergers and acquisitions, global tax planning and international tax controversies, representing high-tech, pharmaceutical, e-commerce, financial, consumer and industrial companies. He advises on tax-efficient structuring of cross-border acquisitions, dispositions, financings, internal reorganizations and joint ventures, as well as tax-beneficial planning for intangible holding companies, global supply chains and multi-jurisdictional service arrangements. Lowell also represents clients before the Internal Revenue Service (IRS), handling audits and obtaining tax rulings. He works with an extensive network of lawyers worldwide, developing tax-favorable transactional and operational cross-border structures. Lowell previously served as the global head of the Firm’s Tax Practice.
- Advising Joh. A. Benckiser on a tax-efficient acquisition structure for the purchase of a $12.5 billion global business, and developing tax-beneficial post-acquisition integration structures
- Advising a client on structuring the global ownership of high-value intangibles, minimizing foreign and US tax codes
- Representing before the IRS two multinational companies in connection with hundreds of millions of dollars of proposed tax adjustments with respect to business operations conducted outside the United States
- Advising a client on tax-efficient transactions for accessing substantial excess cash from foreign subsidiaries without current US taxation and minimal foreign tax costs
- Advising a Fortune 50 client on structuring and reorganizing its global supply chain to achieve low foreign taxes while deferring US taxation
- Best Lawyers in America, Tax Law, 2005–2027
- Chambers USA, Tax, 2018 and 2022-2026
- Legal 500 US, Hall of Fame in US Taxes: Non-Contentious and International Tax, 2018–2025
- International Tax Review, World Tax, 2023-2026
- Chambers Global, Tax: Corporate & Finance and International Tax, 2001–2020
- American Bar Association, chair of the Subcommittee for Controlled Foreign Corporations, PFICs and Contract Manufacturing, and of the Committee on Foreign Activities of US Tax Payers
- American College of Tax Counsel, fellow
- GWU/IRS Annual Institute on International Taxation, member of the advisory board
- International Fiscal Association, USA Branch Counsel
- CCH International Tax Journal, editor in chief
- University of Illinois College of Law, JD, magna cum laude
- University of Illinois Chicago, BS, high distinction
- Illinois
- US Tax Court
- US Court of Appeals for the Fourth Circuit
- US Court of Appeals for the Sixth Circuit
- US Court of Appeals for the Ninth Circuit
- US Internal Revenue Service
- Supreme Court of the United States
- English
Leigh-Alexandra Basha
Washington, DC
Leigh-Alexandra Basha focuses her practice on domestic and international tax and estate planning. She counsels an affluent international client base on a wide range of sophisticated matters, including estate and trust administration, family wealth preservation, foreign trust planning, tax compliance, as well as business succession, expatriation, and pre-immigration planning. Leigh is head of the firm’s Washington, DC, Private Client Practice Group.
- Best Lawyers in America, Tax Law, Trusts and Estates, 2012-2027
- Chambers High Net Worth, Band 1 in District of Columbia: Private Wealth Law and Nationwide: Private Wealth Law: Eastern Region, 2015-2026
- Who’s Who Legal 100, Private Client, 2014-2025
- American Bar Association Section of Real Property, Trust & Estate – working group on Anti-Laundering/Counter-Terrorist Financing, member (2020-present)
- American College of Trust and Estate Counsel (ACTEC), Board of Regents Financial Action Task Force (FATF), delegate
- ACTEC International Estate Planning Committee, past chair; current member
- Georgetown University Law Center, LLM
- American University Washington College of Law, JD
- Georgetown University, AB
- District of Columbia
- Maryland
- Virginia
- Supreme Court of the United States
- US Tax Court
- English
- French
Stephen Wu
Chicago
Stephen Wu is a nationally recognized antitrust lawyer with more than twenty-five years’ experience defending clients against antitrust litigation and government investigations into mergers and acquisitions and business practices. Stephen is also a trusted strategic advisor who counsels clients on antitrust compliance issues.
- Obtained favorable settlement for Geisinger Health in the DOJ’s challenge to its partial interest acquisition of Evangelical Community Hospital (United States v. Evangelical Community Hospital, et al., (M.D. Pa.)
- Obtained favorable settlement for The Permanente Medical Group in a case involving federal and state antitrust and unfair competition claims brought by a competing health system (NorthBay Healthcare Group v. Kaiser Foundation Health Plans, et al., (N.D. Cal.))
- Obtained summary judgement for Southern Illinois Healthcare, the largest health systems in southern Illinois, in antitrust litigation brought by a competing ambulatory surgery center based on allegedly exclusive contracts, a ruling that was affirmed by the US Court of Appeals for the Seventh Circuit (Marion Healthcare LLC v. Southern Illinois Healthcare, et al., (S.D. Ill.))
- BTI Consulting, M&A Client Service All-Stars, 2021
- Best Lawyers in America, Litigation – Antitrust, 2021-2027
- Chambers USA, 2018-2026
- Global Competition Review, recognized as “Elite” in Illinois, 2018-2025
- Lawdragon 500, describing Stephen as a leading antitrust litigator, 2023-2026, Leading Global Antitrust & Competition Lawyer, 2025-2026
- Legal 500 US, describing Stephen as “recommended by clients” for its Tier 1 Healthcare: service providers team, and “recommended” for cartels and merger defense and civil litigation/class action defense, 2016-2025
- American Bar Association, Section of Antitrust Law, member and speaker
- American Bar Association’s Antitrust Law Developments, contributing author
- American Health Lawyers Association’s Antitrust Practice Group, speaker
- Asian American Bar Association of Greater Chicago, Law Foundation, board member
- George Washington University Law School, JD
- University of Illinois at Urbana-Champaign
- Illinois
- US Court of Appeals for the Sixth Circuit
- US Court of Appeals for the Seventh Circuit
- US Court of Appeals for the Ninth Circuit
- US District Court for the Northern District of Illinois
- US District Court for the Southern District of Illinois
- US District Court for the Eastern District of Michigan
Jana Grieb
Frankfurt
Jana Grieb has been advising pharmaceutical and medical technology companies on all aspects of health law for over 20 years. She accompanies pharmaceuticals, medical devices, and in vitro diagnostics throughout their entire life cycle – from research and development to market access, advertising and distribution. One main area of her work is providing legal and strategic advice on market entry and reimbursement paths in the European Union, with a particular focus on the EU regulations on medical devices and in vitro diagnostics and the law governing statutory health insurance in Germany. In this context, Jana also advises on research and distribution collaborations.
Jana advised:
- lifespin GmbH with regard to a research cooperation with Biobank Graz and the clinical oncology department of the medical university of Graz
- AUCTUS Capital Partners AG with regard to the sale of the PharmaLex-Group
- Myonex, Inc. in the acquisition of the clinical trials department of Hubertus Apotheke
- Handelsblatt/Best Lawyers™, Germany: Biotechnology Law and Life Sciences Practice, Health Care Law and Pharmaceuticals Law, 2021-2027
- Chambers Europe, Band 3 in Germany: Life Sciences, 2026
- Chambers Europe, Band 4 in Germany: Life Sciences, 2024-2025
- The Legal 500 EMEA, Recommended, Germany: Healthcare & Life Sciences, 2019-2024
- Chambers Europe, Recommended: Healthcare & Life Sciences, 2015-2023
- German Lawyers’ Association, Working Group for Medical Law
- German Federal Association for the Pharmaceutical Industry
- Nottingham Law School, LL.M.
- Higher Regional Court of Frankfurt, Second State Exam
- Universities of Gießen and Regensburg, First State Exam
- Germany
- English
- German
Eleanor B. Atkins
Washington, DC
Eleanor (Ellie) B. Atkins focuses her practice on trademark and copyright counseling, licensing, prosecution, and enforcement matters as well as due diligence, right of publicity, sweepstakes and promotions, and domain name matters. She regularly counsels clients through the selection, clearance, prosecution, registration, and enforcement of trademarks in the US and internationally. Ellie also assists clients in structuring and negotiating licensing agreements and resolving enforcement disputes across a range of industries including technology, consumer goods, healthcare, and financial services.
- Legal 500 USA, Recommended Lawyer, 2022-2025
- Best Lawyers: Ones to Watch in America, Intellectual Property Law (2021-2026), Patent Law, 2026
- International Trademark Association, Commercialization of IP Committee member
- Washington Area Lawyers for the Arts
- American University Washington College of Law, JD, summa cum laude, Order of the Coif
- Vanderbilt University, BA, cum laude
- District of Columbia
- Maryland
