The following images come from a special decal book from 1938, courtesy of The Fiesta Tableware Co., formerly Homer Laughlin China. They are of patterns that were silk screened onto decal sheets that could then be applied to dinnerware. Such patterns were often made up and lack the shading ordinarily seen in regular decal prints.
Most of the patterns shown did not go into production, however, there are a few notable exceptions. HL.2, Red Clover, was used on Kitchen Kraft, Royal OvenServe, and Nautilus Eggshell. HL.3E was used on Wells and HL.13 is Carnival which was used on Swing Eggshell as S-100. Interestingly, a note is below the Carnival listing that says, "New Convex Plate." This is what Swing was called before they finally decided upon a name.