Wendy's

1969-1983
The drawing in the logo is a stylized portrait of Melinda-Lou "Wendy" Thomas, R. David Thomas's daughter, after whom he named the restaurants.

This first logo was rectangle-shaped, the name "Wendy's" and the illustration of Wendy were both inside the red beveled rectangle with Wendy on the right-hand side of "Wendy's", the words "Old Fashioned Hamburgers" was placed below "Wendy's" and the illustration of Wendy, the rest of the logo was yellow, and the letters were slightly wider.

1983-present
In 1983, the Wendy's logo went into an update. It is now square-shaped and moved the illustration of Wendy to the top center creating a bulging shape in the style of outswept mansard-roofed restaurants (replacing the yellow cubic roof that had beveled rectangles), and the words "Wendy's" and "Old Fashioned Hamburgers" traded places and swapped the colors, the illustration of Wendy was simplified, and the lettering is slightly narrower and bolder. This logo was also used on packaging until late 2011, although this logo is still being used for the cup lids.

The shorthand logo without the words "Old Fashioned Hamburgers". It was primarily used during commercials and for landmarking signs, though some restaurants had two signs (the shorter one with the "Old Fashioned Hamburgers" wording, and the taller one as simply "Wendy's"). This shorthand logo was used for translucent plastic cups from early 2007 until late 2011.