I have 25 years of experience, and specialize in the field of user-interface design with specific knowledge in the areas of visual design, desktop graphical user interfaces and mobile user interfaces. I have published on such topics as user interface design, metaphor design and intellectual property protection. I have testified on graphical user-interface design patents, mobile telecom patents and global positioning systems patents. I am the first graphic designer ever to use computer graphics and one of the first designers in the world to start an independent, computer-based, user-interface design firm.