From the related story on the same site (not able to trademark the designs): https://www.guitarworld.com/music-industry/fender-legal-ruli...

The ruling comes 17 years after Fender was famously unsuccessful in its attempts to make its Stratocaster, Telecaster and Precision guitar body shapes a trademark in the US, decades after the designs were first produced.

That litigation process lasted five years, and demonstrated that countless companies had used the body shapes that Fender had sought to trademark. In the end, the courts ruled that the Stratocaster shape was “so common that it is depicted as a generic electric guitar in a dictionary”.