Just how the marketing channel jobs The earliest variation of a sales channel that I'm able to find is this one from 1904 by Frank Hutchinson Dukesmith, editor of the Salesmanship publication Below, Dukesmith introduced the concept of four stages that cause a sale: Attention, Passion, Need and Sentence. Almost 50 years later, a marketing as well as sales exec in the pharmaceutical market, Arthur F Peterson, released the adhering to illustration in his publication, Drug Selling, Describing, as well as Sales Training: