Meythaler & Zambrano Abogados
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Showcasing particular strength in trade mark disputes, Meythaler & Zambrano Abogados is also adept at a broad array of contentious IP work, such as appeals against pharmaceutical patent enforcement and protection. Also of note is the team's work in complex anti-counterfeit enforcement actions in the pharmaceutical industry. Clients include companies looking to set up in Ecuador as well as large international pharmaceutical companies. The group - which also excels in copyright protection - is co-led by firm President and senior partner José Meythaler Baquero; fellow senior partner and non-contentious IP-specialist Margarita Zambrano ; and head of the IP litigation department, Sebastián Meythaler. Support is provided by key associates Andrea Araujo Mero, who is deputy head of the IP practice; and Maricruz Cepeda who leads the firm’s patents practice. Former head of IP prosecution Maria Belen Rivera left the fim in October 2025.
Legal 500 Editorial commentary
Testimonials
Collated independently by Legal 500 research team.
- 'Collaboration and direct communication with Margarita Zambrano.'
- 'Sebastián Meythaler and Andrea Araujo provided us with guidelines to make our legal process more robust and strategic, enabling us to enforce our intellectual property rights They have even provided us with useful advice to help our company optimize costs throughout the process.'
Key clients
- Grupofarma Del Ecuador
- Merck Frosst Canada
Work highlights
Advised MSC-RE on a cross-border trademark dispute against MSCI, Inc., defending against trademark opposition claims in the the US, Brazil, Colombia, Mexico, Ecuador and El Salvador.