Billy created a device called a TowRack which is a rack for carrying sports equipment such as bikes, skis and kayaks. What makes this item different from other racks is that it attaches to a vehicle's trailer hitch and has a single wheel to help support the weight of the rack and items attached to it. Because it is so much lighter than a regular trailer, it can be used on even the smallest of cars that are not designed to tow regular trailers. Because of the success of this product, competitors introduce similar products. But because of the initial success of Billy's TowRack, all of the similar products are often referred to as TowRacks. Billy has also written a book about using "TowRacks" and safe driving techniques for driving with TowRacks. In a recent commercial for TowRacks, they used a person sounding like Johnny Cash to sing " I tow the Line" (a fun play of his famous song- "I walk the Line").

What intellectual property rights does Billy possess?