the quaker oats logo starting in 1877 had a figure of a quaker man depicted full-length, sometimes holding a scroll with the word "pure" written across it, resembling the classic woodcuts of william penn, the 17th-century philosopher and early quaker. quaker oats advertising dating back to 1909 did, indeed, identify the "quaker man" as william penn, and referred to him as "standard bearer of the quakers and of quaker oats."