The aim of this paper is to establish de Leeuw type [K. de Leeuw, Ann. of Math. 81 (1965) 364–
379] and Kenig–Tomas type [C.E. Kenig, P.A. Tomas, Studia Math. 68 (1989) 79–83] transference
theorems for multipliers and maximal operators defined by multipliers on the multi-parameter Hardy
spaces Hp(Rn) and Hp(Dn), where 0