 At the same time, Perky leased cereal-manufacturing machines to bakers in Denver and Colorado Springs through his Cereal Machine Company and sold wheat processors.One of his wheat-processor buyers, Dr. John Harvey Kellogg, admired Perky's manufacturing process for his shredded wheat cereal.Kellogg declined to purchase Perky's patent on it, however, considering it too weak in taste, "like eating a whisk broom."