Mack, Herbert; Macmillan Company, The; Macom Products Corp.; Magazine Intelligence; Magna Clean; Magnavox City; Magram, Lew; Maiden of Steel Inc.; Malz, Lotte; Mandl, Dr. Otto (& Lili Kraus); Manhattan Storage and Warehouse Co.; Mannheim, Fritz; Mankiewicz, Walther; Mankin, Curt E.; Mankind Publishing Co; Mann, Julie; Maennlein, ?; Manz?