Other Patterson innovations included the "pull-through" sales model, the sales receipt and much more… As Jeffrey Gitomer writes in his book, The Patterson Principles of Selling, Patterson might have been the best salesman of all time, a man who blended the emotion that makes the sale with the logic that figures out the reasoning behind it. Gitomer credits Patterson with a number of sales breakthroughs, including being the first person to realize that a customer is more likely to complete the transaction through buying rather than selling, and the creation of the original "pull-through" model. As Patterson once said, "If the prospect understood the proposition, he would not have to be sold, he would come to buy." Gitomer points to evidence of Patterson’s genius in his ability to create the demand for a receipt rather than just trying to sell the cash register. "This may be one of the most powerful business strategies of the 19th and 20th centuries," he says. Thanks in large part to Patterson’s obsession in promoting its value, the receipt has become universally accepted as the permanent record of a transaction and is today one of the most powerful pieces of paper. It is proof of purchase and ownership. A 1912 company brochure stated: "A receipt, like a deed, is proof of title to property." The Saturday Evening Post in 1953 stated, "He [Patterson] will hardly be forgotten until somebody figures out a better system of salesmanship than the one he put together and drilled into the heads of thousands of salesmen, so many of whom he fired that his system was spread through the country’s business." In short, Patterson created demand for a product no one wanted, the cash register, and took it from nothing to the mainstream of world business operations. NCR’s success was based on an explosion of ideas quickly converted to action beginning in 1884. Not the least of these were Patterson’s innovations in sales techniques that set the rules for all professional sales operations in the future. Of these techniques, the CPC sales convention is perhaps the most important and enduring.