Labor Board v. Pittsburgh S. S. Co.

In NLRB v. Pittsburgh Steamship Co., 340 U.S. 498, 71 S.Ct. 453, 95 L.Ed. 479 (1951), the Court held that an employer's letters to employees on the eve of a union election were not substantial evidence of an unfair labor practice, but the Court "express[ed] no opinion on the possible effect of § 8(c)" on the inferences permissibly drawn from those letters.