For decades, T-shirts, sweatshirts and other clothing under the Columbia Sportswear brand and clothing emblazoned with the Columbia University name coexisted more or less peacefully without confusion.But now, the Portland-based outdoor retailer has sued the New York-based university over alleged trademark infringement and a breach of contract, among other charges. It claims that the university’s merchandise looks too similar to what’s being sold at more than 800 retail locations including more than 150 of i ...