Mine Workers v. Pennington

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

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

Hudgens v. Nat'l Labor Relations Bd.

Holding picketers "did not have a First Amendment right to enter [a privately owned] shopping center for the purpose of advertising their strike"

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

Hughes v. Superior Court

In Hughes v. Superior Court, 339 U.S. 460, the Court held that the Fourteenth Amendment did not bar use of the injunction to prohibit picketing of a place of business solely to secure compliance with a demand that its employees be hired in percentage to the racial origin of its customers.

Central Hardware Co. v. Nat'l Labor Relations Bd.

Finding that retail store parking lot was not "open to the public" and that the retail store could exclude nonemployee union members from parking lot

Steelworkers v. Labor Board

Stating that section 8(b) prohibits labor unions from engaging in "secondary boycotting" by "exert[ing] pressure on an employer not involved in the relevant labor dispute ('the secondary employer') in order to obtain a favorable result in the ongoing labor dispute with another employer ('the primary employer')"

Giant Food Markets, Inc. v. N.L.R.B

Observing that generally it will be easier to communicate with a specific number of discrete employees than with potential customers of a large retail store

Hutzler Bros. Co. v. N.L.R.B

Seattle-First Nat. Bank v. N.L.R.B

In Seattle-First National Bank v. NLRB, 651 F.2d 1272 (9th Cir. 1980), the picketing site was an area outside the entrance to a large restaurant located on the forty-sixth floor of an office building.