Bip39 copyright. Though it uses BIP32 process you'll be able to continue to import BIP39 seeds into Electrum wallet. Also apart from BIp32 there is BIP44 version which some wallet use for your generation of seeds. Quantities proven in italicized textual content are for items listed in currency aside from https://financegoogle70369.wonderkingwiki.com/1101482/the_anatomy_of_the_bip39_phrase_entropy_words_and_stability