reg·is·trant /ˈrɛʤəstrənt/
登記者
Reg·is·trant n. One who registers; esp., one who , by virtue of securing an official registration, obtains a certain right or title of possession, as to a trade-mark.
◄ ►
registrant
n : a person who is formally entered (along with others) in a
register (and who obtains certain rights thereby)