Federal Court, and the case was heard by Judge Albert Charles Wollenberg, who had previously ruled against use of Disney characters in cartoon parodies by the Air Pirates cartoonists. Sales continued to sell unlicensed products after the settlement without paying additional fees. Sales, a producer of unlicensed Keep On Truckin' merchandise, reached a settlement of $750 for the past usage. In the early 1970s, Crumb's lawyer started threatening lawsuits against anyone using the image without permission. The image has been widely copied without permission, appearing on T-shirts, posters, belt buckles, mudflaps, and other items.

The strip's drawings became iconic images of optimism during the hippie era. A visual riff on the lyrics of the Blind Boy Fuller song 'Truckin' My Blues Away', it consists of an assortment of men, drawn in Crumb's distinctive style, strutting confidently across various landscapes. It was published in the first issue of Zap Comix in 1968. Keep On Truckin' is a one-page comic by Robert Crumb. Original 1968 Keep On Truckin' comic, as published in Zap Comix

Keep on truckin images