Before Jerry Siegel and Joe Shuster started Superman in Action Comics #1 (1938), they provided quite a few other features for DC Comics, such as the "Radio Squad".
First appearance (under the feature name "Calling All Cars"): More Fun Comics #11 (July 1936)
Now, remember, this was in 1936 (about 85 years ago!), so the treatment of women back then is quite different from what would be acceptable in a comic book story these days. Also, the idea of police patrol cars that could communicate by wireless radios was still a somewhat recent innovation back then.