What did KTM used to be called?

I'm quite curious, could you possibly enlighten me on something? I've been doing some research on KTM and it seems to have had a name change in the past. Could you tell me, what did KTM used to be called? I'm trying to trace its history and this information would be invaluable to me. I'm assuming it might have been a different name when it was founded or perhaps during a corporate restructuring. Any insights you could provide would be greatly appreciated. Thank you in advance for your assistance.