Buzzing up to architect Luca Cipelletti’s latest residential project in Milan, it’s impossible not to notice two other names on the door: Nathalie Du Pasquier and George Snowden. The designers (who happen to be husband and wife) were founding members of the 1980s radical design movement, the Memphis Group. And when Cipelletti first set foot in the Porta Nuova building’s windowless, L-shaped attic space, which he’d had been hired to make more habitable, the door was labeled with the names of the movement’s founding father, Ettore Sottsass, and cofounder Marco Zanini. “They were the first radicals,” Cipelletti says of the group, known for their irreverent use of zany shapes and…