How the marketing channel works The earliest variation of a sales funnel that I have the ability to discover is this from 1904 by Frank Hutchinson Dukesmith, editor of the Salesmanship magazine Here, Dukesmith presented the concept of 4 phases that result in a sale: Attention, Rate Of Interest, Desire and also Sentence. Almost half a century later on, a marketing as well as sales exec in the pharmaceutical sector, Arthur F Peterson, published the complying with illustration in his book, Pharmaceutical Marketing, Outlining, as well as Sales Educating: