I do think the protool range is initially made by or with the technology if a Czech company "narex" they took over, many of the
Narex tools are visually identical to some protools.
What i think they did was take over narex, improve some of their tools and adapt them to the system and name them Protool. But either Protool didn't take off well enough, or they felt confident enough about the quality to name it Festool. My dealer always told me he wanted to offer Protool but there were difficulties, but at that time TTS was probably already planning the merge.