Firm / Organisation

Adduci, Mastriani & Schaumberg LLP

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Managing Partner: Deanna Tanner Okun
Number of partners:
12 Number of other lawyers: 7

Firm Overview:
For almost 40 years, Adduci, Mastriani & Schaumberg LLP (AMS) has provided expert counsel to meet clients’ unique legal needs in the fields of international trade, customs, intellectual property, and federal court litigation and appeals. The firm specializes in pursuing clients’ legal actions effectively and efficiently before federal regulatory agencies and tribunals, including the US International Trade Commission (‘ITC’), US Department of Commerce (‘DOC’), Federal Courts, and US Customs and Border Protection (‘CBP’). AMS attorneys have worked as ITC Commissioners, legal counsel or advisors to one or more of these government agencies, facilitating the maintenance of good working relations with these offices. Extensive experience in litigating import-related intellectual property, anti-dumping, countervailing duty, and customs cases enables the firm to handle its clients’ international trade concerns rapidly and accurately.

Main Areas of Practice:  

Section 337 Investigations:
The firm is recognized as the most active firm at the ITC, involved in nearly one-third of the 1000+ Section 337 investigations filed before the ITC. The firm’s attorneys include a former ITC Chairman and agency attorneys, and attorneys have helped revise ITC statutes, rules and procedures, adding to their familiarity with the process. The firm has represented both complainants and respondents, thus providing its clients the benefit of highly effective legal strategies and guidance regardless of their role in a particular case. In addition, the firm has been involved with a wide range of products, including semiconductors, computer peripheral equipment, footwear, mobile devices, LEDs, industrial machinery, pharmaceutical and life science products, automotive parts, machine vision software and consumer products. The firm is also deeply involved in sharing its expertise through publications and presentations. In 2019, the American Bar Association published the fourth edition of the firm’s book entitled, ‘A Lawyer’s Guide to Section 337 Investigations Before the US International Trade Commission.’

Trade Law Remedies:
The firm represents foreign and domestic clients in a broad range of actions at the administrative and appellate levels, providing superior legal advice with a focus on the client’s business imperatives. The firm has experience representing clients in anti-dumping and countervailing duty investigations before the DOC, ITC and in appeals before the US Court of International Trade. The firm also has experience representing clients in Section 201, 232, and 301 investigations.

Customs Transactions:
Effectively guiding importers through the maze of Customs and Border Protection (CBP) regulations is an integral part of the firm’s International Trade Practice. The firm’s Washington, DC location allows attorneys to act quickly and effectively at the headquarters level to resolve client matters. AMS attorneys have significant experience successfully representing clients in customs matters before the US Court of International Trade and the US Court of Appeals for the Federal Circuit, saving clients hundreds of millions of dollars in duty savings and refunds. International Trade Policy: The firm helps clients determine the best course of action and guides them to the most appropriate forum for their strategic benefit: the ITC, DOC, USTR, CBP, or a range of trade remedy statutes. AMS prepares strategic plans for clients and facilitates advocacy outreach and coordinates clients’ efforts with similarly aligned industry and nongovernmental partners using their understanding of the interconnected nature of government, business, and the private sector.

The firm utilizes a variety of tools to enforce clients’ IP rights, including working with the appropriate government agencies, traditional litigation, as well as monitoring, identifying, and seeking take-down of illegitimate product listings and websites. Main areas of enforcement practice include enforcement following ITC investigations, brand protection, export control regulation, and intellectual property enforcement.

The firm represents both domestic and international clients, including companies in the industrial, semiconductor, computer, telecommunications, pharmaceutical and automotive industries. AMS is committed to providing excellence by listening to clients, offering realistic legal evaluations, developing strategies and implementing those strategies cost effectively. The firm’s practice continues to grow through referrals from existing clients.


Total 1 contributions

Enforcement of Judgments 2020 Trends and Developments in USA

Asha Allam, Lydia C. Pardini

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Articles, Highlights and Press Releases

Total 2 Articles, Highlights and Press Releases

AMS Announces Partner Promotions

Lauren E. Peterson, Joshua Hartman

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Adduci Mastriani & Schaumberg Selects New Managing Partner

James Adduci, Deanna Tanner Okun

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