LAS VEGAS — When Susana Pacheco accepted a housekeeping job at a casino on the Las Vegas Strip 16 years ago, she believed it was a step toward stability for her and her 2-year-old daughter. But the single…

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…