The outcome of the MAPLE FLOORING MFRS.' ASS'N et al. v. UNITED STATES case was that the Supreme Court of the United States held that the Maple Flooring Manufacturers Association and its members violated the Sherman Act by engaging in activities that restrained trade and commerce. The court ruled that the association's practice of collecting and disseminating information about prices and production among its members was an illegal conspiracy to fix prices and limit production. The court found that the association's actions had the effect of raising prices and reducing competition in the maple flooring industry. As a result, the court ordered the association and its members to cease their illegal activities and imposed fines on the defendants. This case established that trade associations cannot engage in activities that restrain trade and commerce, even if those activities are intended to promote the interests of the industry as a whole.