Studio management and practices change over time. And this was in the first half of the 1970s, before Paramount woke up to the fact that STAR TREK would become a financial goldmine. There was a little window in there when the studio thought STAR TREK reruns would peter out and die soon. Franz Joseph was just very lucky to have such a good product and not be asked to pay any licensing fees on the blueprints. After that, when Paramount knew there was money to be made, Ballantine Books used a technicality to avoid legal hassles over the Technical Manual. The book itself never says Star Trek. The words "Star Trek" appear only on a separate card that slides out of a clear plastic pocket on the black slip-cover, which itself is not part of the book. This trick somehow evaded the licensing question because the book itself was just about "Star Fleet," and Paramount had not yet registered that as a trademark.