The velocity laws of electrons and holes in germanium single crystals at millikelvin temperatures are determined as a function of the electric field in the aOE (c) 001 > orientation, based on time-of-flight measurements in cryogenic coplanar grid Ge detectors. Results obtained in two n-type crystals (|N (a) -N (d) |< 10(10) cm(-3) and doped to 10(11) cm(-3)) are compared with the experimental data from previous investigations, and shown to be consistent with Monte-Carlo simulations of carrier transport.