Exactly how the advertising and marketing funnel works The earliest version of a sales channel that I'm able to locate is this from 1904 by Frank Hutchinson Dukesmith, editor of the Salesmanship publication Here, Dukesmith introduced the principle of four stages that cause a sale: Attention, Rate Of Interest, Desire and also Sentence. Virtually half a century later on, a marketing and also sales executive in the pharmaceutical market, Arthur F Peterson, published the complying with image in his book, Drug Marketing, Detailing, and also Sales Training: