This time last year, Shueisha applied to the Japan Patent Office to gain the trademarks of six Demon Slayer designs, which were initially accepted pending a review.
Shueisha has 40 days from the date of the issued notice (May 26) to appeal the decision of the Japan Patent Office.
While the initial rush of Demon Slayer: Kimetsu no Yaiba popularity may be dying out a little now the Mugen Train film is finishing up in theaters, stores all around Japan are still bringing in the dough with Demon Slayer gear.