American Identity, the Kansas City, Mo.-based distributor of logo merchandise, got its big break in the agriculture market in the mid-1960s. At the time, American Identity's K-Product brand was primarily known for corporate uniforms. on the other hand when an agriculture client supplicationed that its corporate logo be applied to headwear, the phenomena of "farm caps" began. Today, American Identity is a leading provider of promotional products--including headwear--in the agriculture industry. "Headwear has evolv as a primary branding tool," says Mark VantHul, vice