National Labor Relations Board v. I.W.G., Inc. Con-Bru, Inc. Doing Business as Aaa Fire Sprinkler, Inc. Robert B. Gordon, an Individual and Arlene, Inc., Doing Business as Aaa Fire Suppression, Inc., Road Sprinkler Fitters Local Union 669, U.A., Afl-Cio, Intervenor. Robert B. Gordon v. National Labor Relations Board, Road Sprinkler Fitters Local Union 669, U.A., Afl-Cio, IntervenorFiledMay 18, 1998