I serve as an expert witness in intellectual property cases on topics including recommender systems; graphical, mobile, location-based, and touch-based user interfaces; web-based systems and user interfaces; in-home systems and user interfaces, e.g., on set top boxes and DVRS. I have been retained on over 30 matters, including in district court and IPR cases, have written dozens of reports, and have been deposed and testified in court about a dozen times. Email me at for additional details.

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