MI
María Isabel Castello Ferrer
Madrid, Spain
María Isabel Castello Ferrer is a trademark firm in Madrid, Spain, Rated for national trademark work on the cumulative record, one of 3,962 firms filing in Spain, strongest in Pharma, Advertising and Clothing, acting for GENERAL NUTRITION INVESTMENT COMPANY, NEW BALANCE ATHLETIC, SHOE INC (MASSACHUSETTS CORPORATION) and CELAYA, EMPARANZA Y GALDÓS INTERNACIONAL, S.A..
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IPRATE.EURated
TRADEMARKS · 2026
Confidence
High Confidence. The published tier reflects the selected country, vertical, track, and time window.
Vertical
Track
Window
Performance
Trademarks · National · Cumulative (20y)Rating
High Confidence
Archetype
Full-Service Generalist
Distinct Clients
70
Success Rate
100.0%
Volume89
Success88
Speed36
Durability88
Renewals95
Domestic7
Practice profile
Top classes
Pharma(19%) · Nice 5Advertising(14%) · Nice 35Clothing(11%) · Nice 25
Top clients
- GENERAL NUTRITION INVESTMENT COMPANY
- NEW BALANCE ATHLETIC, SHOE INC (MASSACHUSETTS CORPORATION)
- CELAYA, EMPARANZA Y GALDÓS INTERNACIONAL, S.A.
- BOIRON Société anonyme
- NOVAXA DENTAL IBERICA S.L.