One thing on the whole issue:
Somehow, Franz Joseph (the writer of the Tech Manual) was able to copyright the Tech Manual and his blueprints, as an independant work not tied in any way, shape, or form, to Paramount / Roddenberry / The Trek Franchise. It may have been because Roddenberry did ask / allow Franz the ability to draw upon the ST source material, but no mention of that is in the legal copyright paperwork. As such, there are two legal, independantly copyrighted versions of the TOS "Enterprise" hull design, Paramount's "Enterprise" from the show, and Franz Joseph's "Constitution" from the TM / Blueprints. D7 and Warbird are also so doubly-copyrighted, both in TV and Blueprint forms.
Hence SVC's (ADB's) ability to have made SFB in the first place. They are licensed to use a source copyrighted as an independent work.
This doesn't happen anymore. When a "Jar Jar's Children's book" is written, the license / copyright usually spells out that plot, independant characters, etc. are the writers, but everything else is Lucas's (using the SW allegory). Even then, Lucas retains all right to use / adapt / steal / reference the writer's work without future compensation to the writer. Anyone tries to do a massive fan-undertaking like Franz did to make the Tech Manual, and they'll get slapped down on / forced to license with the creator of the source materials faster than a Klingon draws his sword / Bat'leh...
The problems arose when Paramount attempted to cash in / stop all activities from Franz Joseph (continued tech manual and blueprint reprints) and it's "derivative", SFB. Since the Tech Manual / blueprints (and every word contained within it, including Tholan, Tholia, Phaser, Disruptor, Plasma Torpedo, Gorn etc.) are dually copyrighted (both Paramount's and Franz Joseph's copyright), SVC was legal and allowed to use them based on their license with Franz Joseph. However, none of those works / terms would reasonably exist without Paramount / Trek's existance. And it's impossible to revoke the copyright since it was "legally granted", as Paramount didn't complain when Franz Joseph went to copyright his works (Trek was, after all, dead to them at the time.) The compromise is that any futher use of those independantly copyrighted works must be approved by Paramount, and SVC negotiated another license with Paramount allowing him (and ADB) further, fairly unrestricted, use of the terms / concepts contained / derived from Joseph's work, but nothing else from Trek (hence no movie ships, TNG, Enterprise era, etc. etc.)
Meanwhile, SVC did aquire the rights to the Kzinti name / history, based on their inclusion in that one animated series episode and SVC's desire to include all races that shown up in Trek. He actually scored those rights from Niven. However, Interplay / 14 deg. East / Taldren coudn't get the name for SFC, so while the ships / "SSDs" - loadouts / etc. that are SVC's creations can be used, the Kzinti Name / History can't be used in SFC. Hence their renaming / reimaging as the dog-like Mirak...