How the advertising funnel jobs The earliest version of a sales channel that I have the ability to find is this one from 1904 by Frank Hutchinson Dukesmith, editor of the Salesmanship publication Below, Dukesmith introduced the principle of four phases that result in a sale: Attention, Rate Of Interest, Wish as well as Conviction. Nearly half a century later, an advertising and marketing and also sales executive in the pharmaceutical sector, Arthur F Peterson, published the adhering to image in his book, Pharmaceutical Marketing, Explaining, and Sales Educating: