Mew (then spelled ミュー, not ミュウ) was the first Pokémon trademark ever registered (granted on March 31, 1994, registration number 2636685 part 12), before even Pocket Monsters (ポケットモンスター), which was granted on December 26, 1997.
Mew Facts Part Thirteen
Mew (then spelled ミュー, not ミュウ) was the first Pokémon trademark ever registered (granted on March 31, 1994, registration number 2636685 part 12), before even Pocket Monsters (ポケットモンスター), which was granted on December 26, 1997.