NATIONAL LABOR RELATIONS BOARD, Petitioner, v. SHEET METAL WORKERS’ INTERNATIONAL ASSOCIATION, LOCAL UNION NO. 49, AFL-CIO, Respondent. No. 69-70.United States Court of Appeals, Tenth Circuit. August 28, 1970. Daniel M. Katz, Atty., N.L.R.B. (Arnold Ordman, Gen. Counsel, Dominick L. Manoli, Assoc. Gen. Counsel, Marcel Mallet-Prevost, Asst. Gen. Counsel, and Abigail Cooley Baskir, Atty., N.L.R.B., on […]