Professional Real Estate Investors, Inc. v. Columbia Pictures Industries, Inc.

Holding litigants immune from an antitrust claim under Noerr-Pennington immunity

California Transport v. Trucking Unlimited

Holding "the right to petition extends to all departments of the Government," including the courts

Bill Johnson's Restaurants, Inc. v. Nat'l Labor Relations Bd.

Holding that the NLRB could not bar an employer from pursuing a well-grounded lawsuit for damages under state law

Mine Workers v. Pennington

Holding that immunity extends to petitioning conduct “either standing alone or as part of a broader scheme”

Eastern R. Conf. v. Noerr Motors

Holding that antitrust laws do not apply to businesses combining to lobby the government, even where such conduct has an anticompetitive purpose and an anticompetitive effect, because the alternative "would raise important constitutional questions" under the First Amendment

Sears, Roebuck Co. v. Carpenters

Holding that both state and federal courts must defer to the National Labor Relations Board when an activity is arguably protected under § 7 or prohibited by § 8 of the NLRA

Lechmere, Inc. v. Nat'l Labor Relations Bd.

Holding that Board erred in finding that employer should have allowed union on its premises because it had no other way to reach its target audience, inasmuch as in reaching its decision the Board misconstrued prior Supreme Court precedent

Eastex, Inc. v. Nat'l Labor Relations Bd.

Holding that a newsletter that "urg[ed] employees to write their legislators to oppose incorporation of the state 'right-to-work' statute into a revised state constitution," "criticiz[ed] a Presidential veto of an increase in the federal minimum wage and urg[ed] employees to register to vote" was protected concerted activity

Bagley v. CMC Real Estate Corp.

Labor Board v. Babcock Wilcox Co.

Holding that the Board could not require an employer to allow non-employee union representatives to enter the employer's parking lot

Section 15 - Suits by persons injured

Granting private right of action to anyone who has been injured "by reason of anything forbidden in the antitrust laws ..."

Section 1 - Trusts, etc., in restraint of trade illegal; penalty

Forbidding every "contract, combination . . . or conspiracy, in restraint of trade or commerce among the several States"