Found this fun obscurity in the archives of one of my favorite blogs, Allan Holtz's Stripper's Guide. Olsen and Johnson had a byline on Elza Poppin, a daily strip that ran in papers from 1939 to 1944. Of course, Chic and Ole weren't responsible for the art, although George Swanson's loose cartooning is a close cousin of the zany doodles the team usually supplemented their autographs with. Holtz suggests O&J didn't write any of the strips, either. This may be true, but it's quite possible that they donated their joke files to the endeavor. For more Elza Poppin strips, check here and here.