Wheels on a suitcase? They’re so convenient yet they're an unremarkable essential for today's traveler. But in 1970, Bernard Sadow had trouble selling his rolling suitcase idea. After weeks of rejection from department stores, including Macy's, Sadow had a meeting with a Macy's vice president who was impressed with his idea. Macy's sold the first suitcases on wheels in October 1970. It took nearly 20 years for the next advance in rolling luggage. Pulled on two wheels with a retractable handle, today's standard issue black suitcase was invented in the late '80s by Northwest Airlines pilot Bob Plath. But the wheels came first, and the luggage that followed has changed the way people travel.