In the case of National Labor Relations Board v. Pittsburgh Steamship Co., 1948, the U.S Supreme Court ruled in favor of the National Labor Relations Board (NLRB). The dispute arose when Pittsburgh Steamship Company refused to bargain with a union that had been certified by NLRB as an exclusive representative for its unlicensed deck department employees. The company argued that it was not obligated to negotiate because some members of this group were supervisors and therefore excluded from collective bargaining under Section 2(3) of the National Labor Relations Act. However, the court held that even if some members were indeed supervisors, they constituted a minority and their presence did not invalidate NLRB's certification or relieve the company from its duty to bargain with this union. This decision reinforced labor rights by emphasizing employers' obligation to engage in good faith negotiations with duly certified unions.

The dissenting opinion in the case of NATIONAL LABOR RELATIONS BOARD v. PITTSBURGH STEAMSHIP CO., 1948, argued that the majority's decision was a misinterpretation of the National Labor Relations Act (NLRA). The dissenters believed that Congress intended for all employees to have collective bargaining rights under NLRA, including supervisors. They pointed out that excluding supervisors from these protections could lead to conflicts of interest and undermine labor relations stability. Furthermore, they contended that it is not within the Court’s jurisdiction to determine who qualifies as an 'employee' under NLRA but rather this should be determined by Congress or through legislative action. Therefore, they disagreed with the majority's ruling which excluded supervisory staff from being classified as 'employees' eligible for union representation and protection under NLRA.