Welcome. Ridder, Costa & Johnstone LLP is a San Francisco, CA-based law firm specializing in intellectual property, privacy, internet law, and the law of both old and new media. Our attorneys are uniquely positioned to understand the convergence of creative expression, law, and technology. We represent businesses, non-profits and individuals in litigation, counseling, and licensing – throughout the United States and throughout the world.

Founded by Christopher Ridder, Benjamin Costa, and Erica Johnstone, our firm is dedicated to providing risk-management advice tailored to the needs of each client, and to focused, efficient representation. We offer both traditional and alternative pricing models, tailored to the needs of our clients.