Professional Air Traffic Controllers Organization (PATCO) is a labor union in the United States, that is affiliated with the Office and Professional Employees International Union (OPEIU, AFL-CIO, CLC).

PATCO signed an Alliance Agreement with the Teamsters Airline Division on October 15, 2008.

PATCO uses the Federally Registered Trade Mark original union's logo to strengthen its claim to the PATCO lineage.

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