"TSR was also the first to make a
d20 numbered 1 to 20 for that matter."
If you change "make" to "make a
d20 with numbers molded onto the die" I would agree. There was a patented, numbered 1-20,
d20 before TSR existed.
This Nov 1980 advert would seem to state that Gamescience invented the d10 in 1980.
https://imgur.com/a/jG5cmZDThis ad goes further saying the d10 was invented and patented by Gamescience.
https://imgur.com/a/FqKvJSgJust to be clear, I am trying to determine the first game to include a (modern)d10 in the box, not when the first 10 faced die was made or patented(some of the old patented polyhedrals were not fair dice nor regular polyhedrals).