Benjamin P. Liu was known at The John Marshall Law School for his work in IP law, particularly as director of the law school’s Chinese Intellectual Property Resource Center. He was also known as a cheerful presence, a patient adviser, a proud family man and a generous friend. His generosity was apparent in November 2013 after the law school’s Review of Intellectual Property Law Journal symposium. He picked up the tab at a River North restaurant for sake, other drinks and dinner for about a half-dozen …