Dyan Finguerra-DuCharme

With 30 years leading the charge in trademark law, Dyan is a standout among America’s top IP attorneys, relied on by global brands and innovators for her relentless advocacy. Her expertise spans trademark, trade dress, false advertising, and copyright cases, making her the strategic partner for brands in cosmetics, luxury goods, e-commerce, financial services, and beyond. She’s earned elite recognition from Chambers, Forbes, Legal 500, World Trademark Review, and many others—solidifying her status as the attorney competitors hope you don’t hire.

High-Octane IP Battles

Dyan’s litigation skills shine in federal and state courts, and she’s a force at the Trademark Trial and Appeal Board (TTAB), where her early wins and knockout dismissals set the gold standard. Her client wins read like a who's who of industry heavyweights: from securing game-changing settlements for Drive Devilbiss Healthcare, TraxNYC, Honda, Richemont, L’Oréal, and world-famous entertainers like Jay-Z, Lady Gaga, Pharrell Williams, and DJ Khaled, to landmark victories for luxury leaders and innovative startups. Whether it’s defending iconic trademarks or shutting down copycats, Dyan consistently delivers exceptional results and headline-worthy outcomes.

Dyan’s impressive track record of IP victories and outstanding representation for her clients includes:

• Drive Devilbiss Healthcare in a federal trademark litigation; securing summary judgment on the affirmative trademark infringement claim and the defendant’s counterclaims. The case ultimately settled with Drive securing generous monetary relief, a permanent injunction and cancellation of defendant’s MEDAIR trademark registration. The decision includes direct quotes from Dyan’s oral argument.
• Jeweler TraxNYC in a name image and likeness and trademark infringement dispute asserted by 50 Cent. The matter quickly settled on amicable terms.
• Artist Brooke Comegys, whose trademark application for the TITTY MONSTER mark was opposed by Monster Energy Co.; pro bono representation resulted in Monster withdrawing its opposition with prejudice.
• Honda Motor Co. Ltd. and its famous Acura brand in the management of its U.S. trademark portfolio, including providing advice concerning trademark availability, copyright, advertising and commercial translations Dyan is lead trial attorney on numerous oppositions before the Trademark Trial and Appeal Board enforcing HONDA and ACURA’s rights.
• Richemont, a Swiss luxury goods brand that crafts and sells jewelry, watches, leather goods, clothing, accessories, and more, in connection with the management of its U.S. trademark portfolio, including providing advice concerning trademark availability, copyright, advertising, and commercial transactions. Dyan is lead trial attorney on numerous oppositions before the Trademark Trial and Appeal Board enforcing Richemont’s rights. Among the Richemont brands that we have advised since 2008 are: A. Lange & Söhne, Alaïa, AZ Factory, Baume & Mercier, Buccellati, Cartier, Chloé, G-Fore, IWC, Jaeger-LeCoultre, Montblanc, Panerai, Peter Millar, Piaget, Roger Dubuis, Vacheron Constantin Van Cleef & Arpels and Vhernier.
• L’Oréal in the management of its U.S. trademark portfolio, as well as clearance work, for its famous brands including: Aesop, Atelier Cologne, Azzaro, CeraVe, Clarisonic, Decleor, Dessange, Dr.G, Essie, Garnier, IT Cosmetics, Kérastase, Kiehl’s, La Roche-Posay, Lancôme, L’Oréal Paris, L’Oréal Professional, Maison Margiela, Matrix, Maybelline, Mixa, Mugler, NYX Professional Makeup, Prada, Pulp Riot, Pureology, Ralph Lauren, Redken, Roger & Gallet, Shu Uemura, Skinceuticals, Stylenanda, Takami, Urban Decay, Valentino, Vichy, Victor & Rolf and Yves Saint Laurent. L’Oréal’s U.S. trademark portfolio currently consists of over 1,400 marks.
• A global entertainment and education company in claims of copyright and trademark infringement regarding one of the most popular children’s songs of the last 20 years.
• Bare Meats Inc. in a trademark infringement litigation concerning use of the famous BELLUCCI’S PIZZERIA mark; this litigation received significant unsolicited media attention.
• Future in a trademark infringement claim concerning the HIGH OFF LIFE album.
• Greenlane Holdings Inc. in a counterfeit lawsuit brought by UL LLC; following UL’s settlements with the manufacturers, Greenlane thwarted UL’s attempt to resurrect individual claims against Greenlane by obtaining a dismissal of the entire litigation.
• World Trade Resource in a copyright infringement litigation and obtaining a favorable settlement in a counterclaim for copyright infringement and defamation.
• DJ Khaled and Asahd Tuck Khaled in a trademark infringement litigation to enforce their rights in the ASAHD and WE THE BEST trademarks, stepping in as new counsel and promptly securing a favorable settlement for our clients.
• Shawn Carter (p/k/a Jay Z) in a trademark, trade dress, and right of publicity litigation concerning the use of the HOV mark in connection with a tequila presented in packaging confusingly similar to Jay-Z’s ACE OF SPADES Champagne.
• Gerald Celente, a world-renowned trends forecaster, in obtaining preliminary and permanent injunctions in a highly publicized case that stopped defendants Google, Inc. and David Chekroun from operating more than 100 blogs that infringed the CELENTE trademark and Mr. Celente’s right of publicity.
• Pharrell Williams in a federal litigation and TTAB proceeding brought by William Adams (p/k/a WILL.I.AM) concerning Pharrell’s use of the I AM OTHER trademark; we achieved the dismissal of all claims with prejudice.
• Stefani Germanotta (p/k/a Lady Gaga) in various TTAB oppositions, through trial and at summary judgment precluding the registration of confusingly similar marks including BABY GAGA, GAGA JEANS, and PET GAGA.
• Tidal Music AS in several proceedings before the TTAB that precluded the registration of confusingly similar marks including #TIDALTUESDAY and TIDAL FORCE.
• Numerous luxury clients in enforcing copyright and trade dress rights for iconic items of fashion, including Chloé, Alaïa, AZ Factory, and Jimmy Choo.
• sbe Entertainment in several federal litigations to enforce its famous marks including obtaining permanent injunctions that preclude the use of MONDRIAN, HYDE BREWING, and HYDE & VYNE, and successfully settling dozens of other matters without the need for litigation.
• Narrative Capital Partners LLC in a trademark opposition proceeding, securing a favorable settlement for the client that included the abandonment of use of the NARRATIVE CAPITAL mark by a competitor.
• Cetera Financial Holdings Inc. in trademark opposition proceedings precluding registration of marks confusingly similar to CETERA including CENTENA as well as UDRP proceedings.

Global Trademark Protection

Beyond the courtroom, Dyan orchestrates global trademark strategies and portfolio management for renowned brands ensuring their marks remain dominant around the world. Her approach combines sharp legal acumen with practical business insight, keeping clients’ IP assets protected and primed for growth.

Dyan manages large-scale trademark vigilance programs, prosecutes trademarks on a global basis, advises on the availability of trademarks in the U.S., and provides overall trademark portfolio management for clients including:

Richemont International for brands including Alaïa, A. Lange et Sohn, Baume & Mercier, Cartier, Chloé, Dunhill, IWC, Jaeger-Lecoultre, Montblanc, Panerai, Piaget, Roger Dubuis, Vacheron Constantin, and Van Cleef & Arpels.

L’Oréal for brands including Aesop, Atelier Cologne, CerVe, Clarisonic, Decleor, Dessange, Essie, Garnier, House 99, IT Cosmetics, Kerastase, Kiehl’s, La Roche-Posay, Lancôme, L’Oréal Paris, Matrix, Maybelline, NYX Professional Makeup, Prada, Pulp Riot, Pureology, Redken, Roger & Gallet, Shu Uemura, Skinceuticals, Urban Decay, Valentino, Vichy, Victor & Rolf, and Yves Saint Laurent.

Changing the IP Game

A recognized leader in the IP field, Dyan’s influence extends to the U.S. Supreme Court, where she’s the attorney of record on major amicus briefs for the New York Intellectual Property Law Association. She’s racked up prestigious honors—including recognition by Chambers USA in IP for the past five years, selection by Forbes for two consecutive years as a Top 200 Lawyer, and annual recognition since 2012 by World Trademark Review’s “Leading Trademark Lawyer.” She has also earned Managing IP’s U.S. Practitioner of the Year, and Lexology’s Client Choice Award—while clients rave about her transparency, strategic vision, and unwavering commitment to their success.