John Sayles, of Sayles Graphic Design, has developed over 500 logos and icons and nearly 200 letterhead programs in addition to projects involving packaging, direct mail, collateral, and environments. Sayles Graphic Design has their work included in the permanent collections of the Smithsonian Institution's National Design Museum and the Library of Congress. They are based in Des Moines, IA. http://www.saylesdesign.com