420 U.S. 251 (1975) Cited 434 times 64 Legal Analyses
Holding that an employer commits an unfair labor practice by compelling an employee to attend an investigatory meeting that could lead to discipline without allowing the employee to bring a union witness
441 U.S. 488 (1979) Cited 288 times 1 Legal Analyses
Holding that proposal concerning in-plant cafeteria prices was within duty to bargain despite fact that prices were set by third-party supplier rather than employer
465 U.S. 822 (1984) Cited 206 times 9 Legal Analyses
Holding that a "lone employee's invocation of a right grounded in his collective-bargaining agreement is . . . a concerted activity in a very real sense" because the employee is in effect reminding his employer of the power of the group that brought about the agreement and that could be reharnessed if the employer refuses to respect the employee's objection
437 U.S. 556 (1978) Cited 196 times 13 Legal Analyses
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
321 U.S. 332 (1944) Cited 457 times 3 Legal Analyses
Holding that the result of a collective bargaining agreement is not "a contract of employment except in rare cases; no one has a job by reason of it and no obligation to any individual ordinarily comes into existence from it alone"
419 U.S. 301 (1974) Cited 55 times 12 Legal Analyses
Recognizing "that while the election process has acknowledged superiority in ascertaining whether a union has majority support, [signed employee authorization] cards may adequately reflect employee sentiment"
In Mushroom Transportation Co. v. NLRB, 330 F.2d 683, 685 (3d Cir. 1964), we held that to qualify as concerted activity "it must appear at the very least that [the conduct] was engaged in with the object of initiating or inducing or preparing for group action or that it had some relation to group action in the interest of the employees."