wizarding us is corporate as hell
everyone wants to major in spell development and potions research and charm-crafting, that’s where the money is (it used to be in healing, but have you seen the malpractice premiums for splinchologists? yeah)
disputes over intellectual property re: spells, postions, and the like can be solved by bringing it before the court system, which will review the relative claims and accompanying documents.
………or you can just fucking duel for it.
most magical law firms retain one (1) highly-skilled duellist for this exact purpose.