Evaporation residue production in cold fusion reactions of Pb- and Bi- target nuclei with projectiles of elements between Ti (Z=22) and Zn (Z=30) leading to compound nuclei Z_CN = 104 - 113 was investigated at SHIP. The result was the first unambiguous identification of isotopes of elements Z = 110, Z = 111 and Z = 112 in bombardments of Pb-208, Bi-209 with Ni-62,64, Zn-70. We further report on the identification of Db-256, Lr-252 and on new, improved decay data of Lr-253, Rf-255, Db-257, allowing a first deeper insight in the nuclear structure of these isotopes.