Potentials for which the corresponding Schrodinger equation is maximally su
per-integrable in three-dimensional Euclidean space are studied. The quadra
tic algebra which is associated with each of these potentials is constructe
d and the bound state wave functions are computed in the separable coordina
tes. (C) 1999 American Institute of Physics. [S0022-2488(99)02602-X].