An Idle Thought About Demons’s Dice Notation

I meant to mention this in my main post but totally spaced it in the effort to finish and publish it before I went to work: In the Role Aids Demons supplement, dice notation is written as a range, for example: 2-to-12 rather than 2d6 or 3-to-30 rather than 3d10. At the time, was there a question as to whether TSR had exclusive rights to the xdy dice notation? This would not shock me but I’m also interested in the possibility that it was a deliberate choice for some other reason. Anyone who knows: please tell me!