How the marketing funnel works The earliest variation of a sales funnel that I have the ability to locate is this set from 1904 by Frank Hutchinson Dukesmith, editor of the Salesmanship publication Right here, Dukesmith presented the concept of 4 phases that bring about a sale: Focus, Rate Of Interest, Wish as well as Sentence. Virtually half a century later on, an advertising and also sales executive in the pharmaceutical industry, Arthur F Peterson, published the complying with image in his publication, Drug Marketing, Detailing, and Sales Training: